Classification and characteristics of fire-resistant paint for metal and brick

Painting metal stoves, fireplaces and stoves built of brick is not a problem. Because on the market today you can buy three types of paint and varnish products for these heating devices. It is a fire-resistant paint for metal, heat-resistant and heat-resistant. The last two can also be used for painting brick structures. Let's understand these paints, determine their temperature conditions and application methods.

How to paint a brick oven Source gidkaminov.ru

Scope of application of heat-resistant paints

In domestic conditions, heat-resistant paints are widely used to paint heating and sauna stoves, barbecues and fireplaces, radiators and other elements of the heating system.
At enterprises for various purposes, they are used to protect equipment, pipes, and various structural elements that must constantly withstand high-temperature exposure. Heat-resistant compounds perform several main tasks:

• protective - they protect painted surfaces not only from thermal effects, but also from corrosion, and some of them are resistant to aggressive acidic or alkaline environments;
• decorative – provide painted surfaces with an attractive appearance.

Heat-resistant paint protects not only the surface itself. For example, if it is used to apply to a pipeline, it provides additional protection from heat to the substance that is pumped through the pipes.

Other Elcon enamels

In addition to heat-resistant paint, the company’s product range also includes several other products used for industrial and personal purposes:

• Organosilicate composition OS-12-03. This paint is designed for anti-corrosion protection of metal surfaces.
• Weatherproof enamel KO-198. This composition is intended for coating concrete and reinforced concrete surfaces, as well as metal surfaces that are used in aggressive environments such as saline solutions or acids.
• Si-VD emulsion. It is used for impregnation of residential and industrial premises. Designed to protect wood from fire, as well as mold, fungi and other biological damage.

Pros and cons of heat-resistant paints

The main advantages of heat-resistant compounds are:

• high efficiency - they provide reliable protection against heat and the resulting deformation;
• versatility - treated surfaces receive additional protection from other influences, for example from environments that can cause corrosion;
• elasticity - thanks to this feature, even repeated heating and cooling will not cause cracks in the coating;
• ease of application - heat-resistant paint can be applied in different ways, including paint, roller or using special sprayers, and there is no need to additionally train personnel; workers with painting skills can handle this task;
• durability - durable coating withstands external influences well, it is not afraid of sudden temperature changes and UV radiation, it does not need to be updated frequently;
• safety - when the coating heats up, it does not emit chemicals hazardous to human life and health;
• good decorative properties - as a rule, heat-resistant metal paints of various colors are on sale, and many of them can be mixed with colors to obtain the desired shade.

• The main disadvantage of such compositions is that they are usually more expensive than conventional paints. They also take a relatively long time to dry and often have a sharp, unpleasant odor that disappears only after complete drying.

Preparation for painting and application methods

The surface is first prepared. The requirements for the surface to be painted are usually described in the instructions for the composition. Some marks can be applied without any prep work, but in most cases you will need to do the following:

1. The surface is degreased, cleaned of old coating and salts.
2. Remove rust. There should be no rust stains left, and the metal surface should acquire a silver color. For processing, use a wire attachment on a grinder or regular sandpaper. You can use sandblasting.
3. Then the surface is washed and dried. Using a solvent, the surface is completely degreased. After degreasing, you need to wait six hours if the work is carried out in the air. You need to wait a day indoors.
4. Then the coloring composition is applied. There can be several layers of application; in this case, it is better to apply them in different directions - this way, a better finish is achieved.

Paint is applied to the surface in three ways:

Consumption directly depends on the method of application. If the composition is applied with a brush, then the consumption will be 10-40% more than in the case of an aerosol, while the durability of the coating will be approximately the same.

Before work, you need to carefully read the instructions and comply with all painting conditions: temperature conditions, drying conditions, time intervals between applying a new layer. Then the paintwork will last a long time, maintaining its properties.

Aerosol paints in cans are designed for painting small parts and surfaces in hard-to-reach places.

These disposable materials are also used for decorative and restoration work, as well as for the production of stencil designs and graffiti.

They are made in the form of containers (paint cylinders) filled with gas and dye under pressure.

Characteristics of the compositions

Heat-resistant mixtures must have certain composition characteristics. Under the influence of temperatures, the material tends to stretch, which means that most coatings will simply peel off or crack. Only then can the paint be considered truly high quality. Such features of heat-resistant compounds include:

• strength while maintaining plasticity properties so that the coating does not stretch or crack when heated. Otherwise, paint peeling will begin after the first heating;
• good protection against corrosion, which is especially important when painting a stove in a bathhouse. The better the coating resists moisture, the longer it will last;
• low susceptibility to sudden changes in temperature conditions;
• abrasion resistance;
• easy application;
• increased adhesion parameters;
• inertness, both in the physical and chemical sense. The coating should not react with the surrounding aggressive media;
• electrical insulation parameters - important when applied to surfaces that must pass current.

Such paint characteristics are obtained only due to the special composition. Paints and varnishes with similar properties are widely used for application to fireplaces, heating stoves, radiators, as well as heating system pipes and various deep fryers, barbecues, and barbecue devices.

Due to their properties, paint coatings with the characteristics under consideration are successfully used in: aircraft construction, automobile and machine tool construction, for painting roofing coverings and metal profiles.

Almost all parts in machine tools that can be subjected to extreme heat or even heat in industry are treated with paints and varnishes with high temperature parameters.

Paints that are not classified as heat-resistant cannot withstand temperatures above 80°C. After such exposure, the coating easily peels off and cracks.

Important to know: What paints to use for exterior work

Which paint is best?

As mentioned earlier, the wide variety of paints allows customers to choose from several alternatives. You should take into account operating conditions, environmental properties (humidity, dust levels, etc.), as well as your financial capabilities. It is better to use expensive silicone paint, but for many it is still too expensive.

For iron

Iron furnaces are quite susceptible to degradation and oxidation, since the molecular structure predisposes the material to react with oxygen. High temperature also quite actively accelerates this process, which shortens the service life of the furnace.

If you want the stove to serve for many years, then you should use silicone paint from various manufacturers.

One of the leaders in the domestic market is Elcon, which has modern production. This manufacturer belongs to the “budget” class, but its quality is sufficient for domestic use.

It is important to carefully follow the painting technology, since otherwise the paint will not be able to protect against destructive factors. Remember that painting is not a universal solution that is guaranteed to protect the metal - it is important to follow the painting technology!

For cast iron

Cast iron is a fairly strong metal alloy that can withstand prolonged exposure to extremely high temperatures. Some sources report that you can avoid dyeing altogether, but it’s better to be on the safe side.

An excellent option for a cast iron stove is water-based acrylic or polyurethane paint, which has proven itself to be excellent. Moreover, the cast iron alloy tolerates even violations of the painting technology more favorably, so you don’t have to worry about making quite serious mistakes.

Composition of fire-resistant dyes

The main difference between heat-resistant paints for metal and conventional ones is that fire-resistant paints contain pigments based on substances that are resistant to elevated temperatures.

Most of these dyes contain up to 50% titanium dioxide. Which has a melting point of +1855 degrees and, when added to the paint, reliably binds its components into a homogeneous mass, preventing it from igniting.

Ferrous oxide is added to the mixture, which is not subject to decomposition at high temperatures, and, like titanium oxide, allows the components in the composition to be more tightly bound. Heat-resistant paint contains chromium oxide, which increases its viscosity and color stability when exposed to high temperatures.

The listed elements are combined using a liquid base, which may consist of synthetic or organic non-flammable substances. This composition is used to treat metal surfaces that can be heated up to +1000 degrees.

If it is necessary to paint metal products that will not heat above +200 degrees, then in this case it is possible to use high-temperature paints based on epoxy resin.

Scope of application

High-temperature paint for metal is used for painting:

• heating radiators,
• internal combustion engine parts,
• stoves, boilers, fireplaces and various outdoor cooking equipment.

High temperature colors can be used in production. For example, in the production of drying chambers, roofing materials or machine tools, and at home during the independent construction of fireplaces or stoves.

Regardless of the scope of application of high-temperature paint, it is necessary to know exactly what criteria are used to select a high-temperature paint composition.

How to choose the right one

Only correctly selected paint will allow high-quality painting of a metal element that is operated at elevated temperatures.

To paint a solid fuel stove, it is also necessary to use fire-resistant dyes. If you ignore this rule, then with significant heating, ordinary paint will not only lose its aesthetic appearance, but can also cause a fire.

When painting parts of stoves and fireplaces, it is necessary to determine whether they are made of non-ferrous or ferrous metal. What type of surface the paint composition is intended for is usually indicated on the packaging, so you should study it very carefully when purchasing the product.

Video:

Important Features

To choose the right heat-resistant paint for metal up to 1000 degrees, it is worth studying the features of such products.

Components of fire-resistant paint composition

The set of ingredients used in the manufacture of the material depends on the temperature that the finished coating must withstand. The paint may include:

1. Alkyd or acrylic resins. The coating can withstand temperatures up to +100 °C. Alkyd compounds are used for painting household heating radiators.
2. Epoxy resins. The introduction of this component increases the temperature threshold to +200 °C.
3. Ethyl silicate resins. The coating can withstand heating up to +400 °C. Ethyl silicate base can be mixed with metal powder.
4. Silicone resins. The stability threshold increases to +600 °C.
5. Composite or heat-resistant glass. Such additives make the paint able to withstand heating up to +1000 °C.

The paint may contain alkyd resins.

Properties of dyes

High-quality fire-resistant paint should have the following qualities:

1. Plasticity. When the metal expands when heated, the paint should do this along with it. Otherwise, cracks will appear on the coating.
2. Dielectric properties. This characteristic is important when painting objects that can conduct current.
3. Anti-corrosion properties. Heat-resistant paints should prevent the appearance of traces of rust on metal structures.
4. Maintains performance characteristics during temperature changes.

Application area

Heat-resistant paints for metal are used for processing:

• heating equipment;
• engine components;
• boilers, stoves, fireplaces;
• barbecues and other devices used for cooking food outdoors.

Heat-resistant paints for metal are used for boilers.

High-temperature dyes are also used in industrial conditions, for example in the production of:

• machine tools;
• roofing materials;
• drying chambers.

Requirements and compliance with GOST

According to the state standard, varnishes and enamels that retain their properties under intense long-term heating are called heat-resistant. GOST R 51691-2000 specifies the following requirements for compositions:

1. The paint must be resistant to sunlight. They meet the coating standard, preserving the properties and appearance when using painted objects outdoors.
2. Light fastness is not a requirement. The prescription concerns only aesthetic properties. The coating may fade or turn yellow, but not lose its protective qualities.
3. An important property is abrasion resistance. The paint layer that meets the standards is not damaged when using detergents and sponges. When washed off, the water should not be colored.
4. Moisture-resistant paints are paints that can be used to cover underwater surfaces.

According to GOST, enamels retain their properties under intense long-term heating.

What distinguishes heat-resistant paint from fire-retardant paint?

The first type of composition can withstand strong heat without interacting with an open flame. Fire retardant varieties are designed to slow down the combustion process. They increase the fire safety of house elements - metal frames, floor slabs, pipelines and other communications. The mechanism of operation of fire retardants is as follows:

• the flame retardants contained in the composition are activated by a sharp increase in temperature;
• the paint increases in volume;
• the foam becomes a barrier that does not transfer heat from the fire to the surface.

Heat-resistant paints do not have such properties.

Types of heat-resistant coatings

The most popular are high-temperature finishing materials in the following forms of release:

• heat-resistant enamel in a jar or bucket;
• heat-resistant spray paint in cans.

One form or another should be used depending on the location of treatment and personal preference. It is convenient to apply the enamel with a roller over a large area, and aerosol paint will help you reach corners and hard-to-reach places.

Manufacturers produce heat-resistant paint on different bases. They differ in their basic properties, scope, ease of application and safety. On store shelves you can find the following coatings:

• acrylic;
• alkyd;
• epoxy;
• silicone.

Oil-based paints should not be applied to a surface that is heated, since when exposed to high temperatures they release harmful volatile substances with a characteristic unpleasant odor.

Characteristics and distinctive properties

Main characteristics of paints in spray cans:

• Aerosol is ready-to-use paint. All you need to do is shake the can for a few seconds so that the paint is evenly mixed inside the can.
• It does a great job of getting into any crevices, scratches, and other places that are hard to reach.
• You don’t need to buy additional attributes for it (brushes, trays, rollers, etc.).
• It has good adhesion.
• Does not fade.
• Dries quickly.
• It won't be erased.
• It is stored for a long time and is easily transported.
• A variety of types of coloring compositions: acrylic, latex, alkyd, oil and others.
• The widest selection of aerosol paint color options.
• Compositions with special effects (glossy, pearlescent, matte, imitating metal, semi-matte, textured, luminous and others).
• The transitions from different colors are very smooth.
• Sealed storage. Due to the fact that the paint is in a can, it does not erode and emit almost no odor.
• They don't dry out for a long time.

It is worth noting that aerosols:

• They cannot be mixed with each other, which means it is impossible to get any unique shade.
• Even aerosols can form drips if the paint is used too much (as a rule, this occurs among beginners).
• Restrictions in the form of masking tape are required to obtain clear contours.
• It is impossible to make paint thinner or thicker.
• There are conditions for work - no wind.

Acrylic heat-resistant coating

Acrylic compounds are the safest for treating indoor surfaces. But such materials do not have very good resistance to high temperatures. They usually withstand temperatures up to 100 degrees.

Acrylic compositions are used to coat elements of heating systems, for example, metal radiators, gas boilers. Their advantages include:

• no pungent odor;
• good adhesion to the surface;
• rust protection;
• uniform application, no smudges;
• wide selection of colors;
• resistance to moisture and dust.

Apply acrylic heat-resistant finishing materials to degreased and dry surfaces using a brush. Since they dry very quickly, it is better to do this on a cold surface.

Tips for choosing

The result of the work will meet the stated requirements and you will not have to spend extra money if you follow certain tips:

1. Each surface to be painted requires a different type of dye. For example, acrylic is only suitable for painting wooden, glass and plastic substrates. For metallic materials, compositions containing zinc and aluminum will be required.
2. If the design requires the creation of a certain style, you can use paints with special effects that imitate dents or a hammer blow.
3. Follow the information on the paint packaging when calculating the consumption of the heat-resistant mixture per square meter.

In particular, clarify the consumption per square meter, the resulting color based on the outcome and the number of layers required.

Despite the undeniable advantages: ease of application, lack of special preparation of surfaces and the ability to work with paint, the ability to protect the product from moisture cannot be considered universal for all construction work.

Therefore, during operation, the layers of the product should be updated.

Alkyd heat-resistant coating

Alkyd heat-resistant enamels can withstand heating temperatures up to 150 degrees. Based on this, they can be used for exterior finishing of stoves in places where there is no risk of fire, or indoors for painting radiators.

It is important to consider that alkyd compounds have a pungent, unpleasant odor, so they must be applied to a cooled surface. Among the advantages of this type of thermal coating:

• Can be used on any surface, high level of adhesion;
• service life up to 10 years;
• protection of the surface from external influences.

The alkyd composition should be applied to the surface in two layers so that the color is more uniform. It is convenient to use a brush to work with it, but some manufacturers produce an alkyd aerosol. Although it can be used to quickly paint hard-to-reach places, the material consumption in this case increases significantly.

Popular manufacturers

Well-known brands on the heat-resistant paint market include:

• Certa is a Russian company offering a wide selection of enamels. The maximum heating temperature for most mixtures is +900 ° C.
• Elcon has been known on the market since 1998. Enamels are produced that can withstand not only heat, but also severe frosts.
• Termal is a Finnish company. Produces alkyd mixtures for use in saunas and baths.

Epoxy heat resistant coating

Epoxy thermal paint is designed for coating surfaces exposed to heat up to 400 degrees. They add special metal chips to their composition, which enhances resistance to high temperatures.

Epoxy paint is suitable for stoves, fireplaces, and barbecues. Its great advantage is its good adhesion to surfaces made of metal, brick, and natural stone. In addition, it has other advantages:

• preventing the formation of corrosion;
• super strength, resistance to abrasion and other mechanical stress;
• service life up to 15 years.

Epoxy high temperature paint is safe, so it can be used both indoors and outdoors. It belongs to two-component finishing materials, so before starting work, you need to mix it. This is very convenient, as you can control the consumption yourself.

Heat-resistant paint for a barbecue or metal fireplace grate is applied to a previously sanded surface. When working with brick coating, it should be treated with a special epoxy primer.

How to apply it to the surface correctly?

In order to achieve the expected results when applying KO 8101 enamel, it is necessary to take into account some rules that will help increase the service life of the coating.

Despite all compliance with GOST, the material must be used correctly:

The main requirement that must be met when applying KO 8101 is a well-prepared surface. The place where the enamel will be applied must be well dried, without plaque or obvious roughness. It is advisable that the surface be grease-free. The surface must be cleaned of rust and chips; in order to remove old paint, you can use the manual method

Air humidity should not exceed 80%.

• If the material is applied in cold conditions, the temperature of the surrounding atmosphere and the surface being coated with enamel should be adjusted. The application site should be at least three degrees warmer than the air. Only in this case will it be possible to avoid the formation of frost or dew. It is not recommended to carry out work when it is raining or snowing.
• Sometimes it becomes necessary to thin the enamel. This happens if the composition looks too thick. Xylene can be used for dilution. Experts advise applying enamel not in one layer, but at least two, then the surface will be uniform and the heat-resistant film will be twice as strong. The second coat follows immediately after the first, “wet on wet”, with intervals between applications of at least 7 minutes. The thickness of the final dried layer should be only 32 microns.

Silicone Heat Resistant Coatings

Silicone heat-resistant paint for metal, depending on the composition, can withstand temperatures from 200 to 1000 degrees. To increase heat resistance, manufacturers add metal powder and heat-resistant glass chips.

These finishing materials form an elastic layer of coating on the surface that is resistant to mechanical damage, moisture and corrosion. Silicone heat-resistant paint is not used for stoves and fireplaces made of stone and brick.

The advantages of this coating include:

• drying speed from 1 hour, depending on temperature and humidity;
• color fastness;
• elasticity;
• service life up to 10 years, depending on operating conditions.

Before you start painting the barbecue, stove or fireplace parts, you should treat all metal parts with a primer. It will significantly improve adhesion and anti-corrosion properties. If paint is applied to a surface that is heated to a temperature of 1000 degrees, it must be sandblasted, thus ensuring adhesion of the metal to the coating.

You should not use these finishing materials yourself without the supervision of a specialist. Although they are easy to apply to the metal surface, for complete hardening it is necessary to heat the coating using special equipment.

Rules for selection and use

To choose the right paint, you need to determine the maximum temperature of the surface on which it will be applied. You also need to calculate the area and make a choice between a spray in a can and a liquid consistency in a jar. But there are still some rules that you need to know.

Specific nuances in terminology

Many salespeople in their advertising campaigns are very frivolous with the terminology adopted for compositions that can be applied to surfaces with high temperatures. There is no normatively established gradation according to the correspondence between the name of the composition and its maximum permissible heating temperature.

However, three established terms are usually used:

• high temperature;
• heat resistant;
• heat resistant.

High-temperature paints for metal include compositions that can withstand prolonged surface heating up to 2000C. They are used for processing radiators and heating pipes, brick stoves and fireplaces. In addition, they are suitable for automotive parts such as engine, muffler and exhaust system.

Water jacket of a metal furnace. From the outside, it does not heat up above the temperature of the coolant, so high-temperature paint can be used to treat its surface

Heat-resistant compounds are used for surfaces with temperatures up to 6500C.

These paints are used for the following metal objects:

• sides and bottoms of furnaces;
• barbecues;
• pipes for exhausting combustion products;
• the junction of the water circuit pipes to the furnace or boiler.

Heat-resistant paints and enamels often contain pigments that give them color, so they can be used to create original interior design solutions.

Heat-resistant paint is designed to cover surfaces that are heated to temperatures above 6500C. First of all, these are cooking stoves and furnace fireboxes, as well as grates for wood-burning stoves and fireplaces.

Some types of thermal paint have an additional feature - fire resistance. This means that the painted surface may be in direct contact with the flame. Among household metal objects, this is relevant for the fireplace grate and the inside of the barbecue.

Theory and practice of thermal hardening

Heat-resistant paint is essentially heat-resistant enamel. To create an impermeable barrier, it is necessary to perform a thermal hardening procedure. In the process of heating the surface with the composition applied to it, polymerization of the layers occurs, after which the access of air to the painted metal is stopped.

Sometimes, to protect metal products, a colorless varnish is applied to them. This type of coating also requires thermal hardening

It is after thermal hardening that neither oxygen, which causes the rusting process, nor moisture can penetrate under the enamel. Before this, the paint has only a decorative and, partially, protective function from physical impact.

Moreover, after creating an impermeable layer, the evaporation of substances contained in the paint into the room air stops. Therefore, ideally, it is necessary to wait until the specified period of complete drying, which is indicated on the label or in the instructions, and then immediately carry out the thermal hardening procedure.

Typically, the temperature at which enamel polymerizes is 200-2500C. This leads to one common mistake that is often made by people who have leftovers after painting their stove.

You cannot apply a heat-resistant compound that requires heat hardening to radiators and heating pipes, since the degree of their heating is insufficient to complete the process. For slightly hot objects, you need to use ordinary high-temperature paint.

Theoretically, the thermal hardening process should take place at a constant temperature for 30-60 minutes. However, in practice, such “laboratory” conditions are impossible to achieve.

Therefore, wood stoves, barbecues and fireplaces are not heated to full capacity and their heating is gradually increased. Typically a test run takes 1.5-2 hours. Another option is heating with an industrial hair dryer.

How to use it correctly?

To prepare the surface for painting, it should be cleaned of dirt, rust, old paint, oil or grease. Mechanical or manual cleaning can be carried out. Surface treatment is carried out to degrees St 3 or SA2-SA2.5. The letters St indicate that it is cleaned manually or mechanically, using a brush. Before cleaning, all rust should be scraped off the surfaces and any remaining oil and dirt should be removed. After all contaminants have been removed, dust removal is carried out.

Blasting is designated by the letters SA. Grade SA2-SA2.5 requires very thorough surface cleaning. During the inspection, no oil residues, rust, paint or other contaminants should be detected.

After the surface is completely cleaned, it should be degreased with a solvent; “Solvent” or “Xylene” may be suitable for this. The surface should be degreased before work. After treatment, the product should not be kept outside for more than six hours without degreasing and indoors for more than a day.

Before you start working with paint, you should check the surface to make sure it is not dirty or wet.

Preparatory stage

After opening the jar, stir the enamel thoroughly until the sediment disappears and wait ten minutes until the bubbles disappear. The viscosity of enamel can be measured with a special device, the VZ-246 viscometer; it is designed to determine a conditional indicator, that is, the expiration time of the paintwork material. Using “Xylene” or “Solvent”, you can dilute the paint to the desired consistency, but not more than 30%. At the end of the work, the jar is tightly closed and left for storage.

When working with solvents, it is important to know that they are quite toxic, so it is not recommended to apply Certa enamel inside a residential area.

Coloring

The paint is applied to the surface using a roller or brush. It should be applied in a thin layer; this determines how well the silicone film and metal adhere.

Using a spray bottle or aerosol can you can get a more uniform coating.

When using Certa aerosol paint in a can, you get a very smooth coating, but a lot of toxic substances get into the air. It is better to use this option for painting not very large objects, such as a grill, barbecue or muffler. It is important to carry out work in the fresh air, using products to protect against toxic substances.

Many heat-resistant materials do not require pre-treatment. The consumption of paints and varnishes will depend on the conditions under which they are used. When painting the walls of a chimney, two layers of enamel should be applied; when painting barbecues or barbecues, one is enough. Apply 2-3 thick layers on brick or plaster surfaces.

Kinds

Based on their composition, polyurethane coatings can be divided into two groups:

• two-component products that require mixing, since each component is produced in a separate container;
• one-component paints that do not require mixing - they can be used immediately after purchasing and preparing the surface, since all the main components are already present in the product.

One of the cans of a two-component composition contains a hardener, the second contains resin. This variety is much stronger and is more resistant to external negative factors affecting the surface. The product sets without the participation of water vapor from the air, which greatly expands the range of use of the product.

Classification of one-component paints by type of base

To classify one-component paints, they can be divided into three categories:

• products based on organic compounds;
• alkyd-urethane products;
• water-dispersed suspensions.

The composition of polyurethane compounds of the first category, in addition to the main elements, includes xylene or toluene. To dilute such materials, specialized solvents are produced. The product achieves a solid state due to the reaction of the components with moisture from the air. Therefore, the time required for this type of paint to completely dry will depend on the level of air humidity in the room.

The second type contains alkyd-urethane varnish. A distinctive feature of this paint is its very short drying time, usually one and a half hours. White spirit is additionally purchased as a solvent for alkyd-urethane products.

The latter type has a similar name due to the solvent that is used for this product - during the work you will need ordinary water. Water-dispersion paints are odorless and harmless to humans; when painting a surface with such a composition, there is no need to use additional protective equipment. They set due to the moisture contained in the air.

Powder and epoxy-polyurethane paints

We can distinguish another type of polyurethane products for painting - powder compositions. They are produced in the form of a homogenized mixture, the components of which are: pigments, hardener, polyester resin and filler.

This type belongs to thermosetting dyes. They process the product or base, after which they are subjected to heat treatment, resulting in a reaction between the components that fuse with each other. The result of such work is a durable and hard coating. That is why powder compositions are most often used for work in mechanical engineering.

Epoxy-polyurethane paint is highly resistant, therefore it is used in industry for treating various types of structures that come into contact with aggressive environments, to provide them with a good level of protection.

Classification by method of application

Also, polyurethane compositions can be divided into groups according to the method of application to the surface:

• aerosol products;
• paint that must be applied with a roller or brush.

The first group of coatings is used for metal products and surfaces. Automotive polyurethane paint in cans forms a uniform coating that is completely free of smudges and streaks.

Top fireproof paints for metal up to 1000 degrees

To protect a heating radiator, metal stove or other objects from corrosion and aggressive external influences, they are coated with heat-resistant paint and varnish enamels. The paint and varnish coating can withstand up to 1000 degrees C. Enamel not only protects, but also gives an aesthetic appearance.

Making a choice in favor of one paint or another is difficult. A fresh coating will give the products a new appearance. We have compiled for you a rating of the most popular paint coatings. All submitted candidates have been verified by operational practice and experience.

Tikkurila termal silikonimaali

Country of origin: Finland and Russia. Used for painting metal products. Based on silicone resin. Suitable for indoor and outdoor use. Resistant to high temperatures up to 400 degrees. This property provides protection for chimney pipes and dampers. Used for painting car muffler. Black color. After drying, a semi-matte shine is formed. Protects the metal structure.

Apply with a brush or spray. Complete drying time at a temperature of +230 C is exactly 1 hour. You can use cleaning products to wash the surface after one month. One liter of enamel is designed for 16-20 square meters. If the paint is applied in one layer. The price corresponds to the quality. The only minus is heat treatment after application to ensure complete drying.

Celsite-600

Black paint. Withstands temperatures up to +600 degrees. High degree of protection when using metal under the influence of high temperatures and moisture. Resistant to the influence of petroleum products, oil, gasoline. Used for painting: electric motors, transformers, household heating appliances, bridges, tanks, metal structures, railway tanks, calipers. Can be applied to reinforced concrete, asbestos-cement, brick, plastered surfaces. The enamel is applied in three layers. The color is black, the surface acquires a matte tint.

Certa KO-85

Certa is used for items that operate at temperatures from -50 to 900 degrees C. Heat-resistant enamel. Tolerates temperature changes well, including high temperatures. Protects against aggressive environments and high levels of humidity. Prevents corrosion and moisture ingress. Apply at minus 30 degrees Celsius. Transparent paint material. Used instead of varnish to coat brick, concrete, and ceramics. Apply in three layers to achieve a matte finish. In one layer, the brick acquires a wet effect.

Elcon

To obtain the desired color it is mixed with colorant. At the same time, the pigment contained reduces the level of protection and durability of the painted coating.

The color palette is very rich. The gloss can be matte or glossy. A product painted in classic black can be heated up to 1000. And all other colors are not higher than 700 degrees. You can create beautiful patterns on the walls using a stencil without involving specialists. In addition to metal surfaces, it protects concrete, brick, and asbestos products from the influence of aggressive environments.

Kudo

The composition does not contain toxic components. When used, harmful substances are not released into the air. Can be used inside a living room, stove or fireplace, chimney. There is no need to apply a primer before application. Complete drying time 2 hours. It is considered slightly flammable and difficult to ignite. The room temperature is not lower than +3C. Service life is at least 20 years. Universal, can be used on products of different surfaces.

Dali

Matte paint for interior and exterior work. Used for painting car exhaust systems, chimneys, and chimneys. Black color. Before opening the can, the manufacturer recommends stirring the contents well. Apply by brush or spray. Drying time from 1 to 3 hours. If you want to apply several layers to the product, then the time interval for each layer is 1 hour. Thermal curing for 2 hours at 200 degrees.

Heat-resistant silver oxide Novbytkhim

Heat-resistant universal. Used for glass, brick, concrete, plaster surfaces. The resulting layer protects against oil, gasoline, water, and steam, salt fog in the range from – 50 to +600 degrees Celsius. Withstands sudden temperature changes, but within the range indicated on the package. The enamel is waterproof and dries quickly. Apply no more than three layers. Stir not only before application, but also during application. Pre-prepare the surface. Clean from dust and dirt. Contains organic substances.

Bosny Hi-Temp (color)

Acrylic-based paint with silicone pigmentation from Bosny has a lower permissible temperature than black or silver. It is characterized by good quality at an average price for products of this class.

Due to the lower permissible temperature, the scope of application of Bosny Hi-Temp color paints is slightly different than that of black or silver composition

Main parameters:

• color: red, orange, yellow, green, blue;
• gloss type: matte;
• maximum temperature (0C): 205;
• type of packaging and volume (l): can (0.4);
• Country of origin: Thailand.

The most common area of ​​application is painting pipes and heating radiators. It is also used for decorative painting of car parts. It dries quickly, does not peel off, but requires thermal hardening. Thus, it is better to paint the batteries a day or two before turning them on.

One can is enough to paint 1.5-2 m2 of surface in 2 layers. In addition to sanding, it is advisable to prime the surface. This will significantly increase its resistance to physical damage.

Veslee

Heat-resistant, high-quality metal paint on an acrylic-epoxy base is in the middle price range.

Small capacity cylinders (0.1 l) are used for painting automotive parts. To treat the heating system, it is financially more profitable to take a standard volume (0.52 l) packaging

Main parameters:

• color: black, white, red, silver;
• gloss type: matte;
• maximum temperature (0C): 400 (black), 250 (all others);
• type of packaging and volume (l): can (0.1, 0.52);
• Country of origin: China.

The composition is intended for painting heating circuit elements (excluding fireboxes) and automotive parts (mainly the exhaust system). The availability of small-volume cans for sale is a definite plus when you need to paint a surface with a small area.

The paint is quick-drying - the drying interval between layers is 2-3 minutes.

MagicLine

Spray paint made in China, based on synthetic resin, is located in the middle price range. According to consumer reviews, the temperature indicated on the label is not the maximum allowed for an indefinite period of time, but acceptable for a short-term period.

The most ordinary paint made in China, without any significant pros and cons. Available as an aerosol can

Main parameters:

• black color;
• gloss type: matte;
• maximum temperature (0C): 600;
• type of packaging and volume (l): can (0.4);
• Country of origin: China.

Medium quality products designed for processing metal parts. Not suitable for application to high temperature objects such as the firebox door of a steel oven or hob.

Thermoxol

Russian-made paint is intended for metal surfaces. It is distinguished by good quality, four main colors, packaging of varying volumes and an average price.

If you need to process a lot of radiators and pipes, then it is better to take paint in buckets - it will be much cheaper

Main parameters:

• color: black, white, red-brown, gray;
• gloss type: glossy;
• maximum temperature (0C): 160;
• type of packaging and volume: jar (0.9), bucket (3, 10, 20);
• country of origin: Russia.

The paint contains formaldehyde resin and an acid thinner, so the area must be well ventilated. It can be used for processing ferrous and non-ferrous metals, as well as alloys. The composition can be applied to tightly adherent rust.

Short-term (up to 5 hours) heat resistance – 2100C. The main purpose is painting heating radiators and pipes.

Decorix

This enamel can often be found in stores and retail outlets. It has a low price and acceptable quality.

This cheap enamel is best used for painting sauna stoves and other metal products whose appearance is not particularly important.

Main parameters:

• color: white, aluminum, black;
• gloss type: glossy;
• maximum temperature (0C): 800;
• type of packaging and volume (l): can (0.52);
• Country of origin: China.

Decorix enamel is available in the three most popular colors for metal coating. The mass fraction of paint for such a volume is insignificant - only 0.315 kg (usually 0.34 - 0.36 kg).

The sprayer leg is soldered into the can, so if the composition dries out, it will not be possible to replace the mechanism. Therefore, it is better not to leave partially used paint for a long time.

Useful tips

When purchasing KO 8101 enamel, you can ask the seller for a quality certificate, this will be the main guarantee that you have not received a fake, but a high-quality material that can last for 15 years. This period is set by manufacturers, but practice shows that the material can last much longer, sometimes this period reaches 25 years, even despite the conditions of an aggressive environment and exposure to ultraviolet rays.

Using this paint and varnish material, you can save a lot, since application is quite economical and a small amount of paint is enough to cover a large surface, and a second painting allows you to completely hide all imperfections and enhance protection.

When using the material, you should be careful, since enamel is flammable, which means it should not be left near an open fire.

It is advisable to carry out work with normal air access or good ventilation in the room

You will learn more about heat-resistant enamel in the following video.

General rules of application

The question of the method of application and rules of operation of the compositions deserves special attention. The basic concepts when working with heat-resistant paints are preparation, application, calcination. Technologists recommend properly preparing the surface. The strength of adhesion and the quality of the finish after exposure to temperature depend on this.

Preparation includes the following steps:

• removal of contaminants;
• cleaning corroded areas;
• grinding;
• priming, if necessary;
• complete degreasing of the surface.

Before you start painting the surface, you should make sure that it is completely dry. Paint-and-varnish compositions are applied only to a dry and grease-free surface. The application method depends on the type of paint. The work is carried out using aerosols; for large surfaces it is recommended to select alkyd or silicone paints, which are applied with a roller or brush.

Attention! When applying, you must use protective equipment: suit or apron, gloves, glasses, hat.

Expert opinionZakharova Irina YuryevnaProfi in cleaning with 15 years of experience. Our best expert. First of all, paint is applied to hard-to-reach places: corners, seams, joints. Large areas are then painted. To ensure strong adhesion and ensure an even finish, layers are repeated 2 times.

Calcination is the last stage, which involves artificially heating the area. Calcination is started after the natural hardening of the pigment. The stove, pipes or fireplace are heated at an acceptable temperature for 3 hours. It is recommended to increase the temperature gradually, increasing the load on the coating in stages. This technique helps to better consolidate the created finish, increase protective properties and increase resistance to temperature effects.

Surface preparation and painting

The preparatory stage is simple, but all stages must be completed. Otherwise, you will get a low-quality result that will not last long; the cost of many paints is high, so it is irrational to waste them. As a result, before painting you need to get a surface free of dirt and any impurities.

Perform the following actions:

1. The surface is cleaned with a metal brush.
2. Eliminate existing oxides using a 5% concentrated solution of sulfuric acid.
3. Then the solution is removed using laundry soap.
4. The oven is degreased.

Before painting, check the expiration date and quality of the paint and varnish; it is important that there are no lumps or unnecessary impurities. The composition is thoroughly mixed so that all sediments from the bottom are evenly distributed.

Before painting, check the expiration date and quality of the paint and varnish; it is important that there are no lumps or unnecessary impurities.

It is necessary to achieve an even layer, paying special attention to corners and seams. In order not to stain nearby objects, you can first cover them with film.

The tool you can choose from is a brush, roller and spray gun. If the oven is small, then a brush is enough. The spray bottle cannot be used with all formulations; please refer to the manufacturer's instructions. The walls of the stove can be painted well with a brush, but it will be easier to cover the fittings evenly with an aerosol.

The drying process for paints is different; to find out when you can light the stove after painting, you need to read the manufacturer's recommendations. This usually requires waiting 3-4 days.

It is better to take your time in this matter so that the paint can set well and serve for a long time, reliably protecting the metal surface from moisture and high temperatures.

It will be easier to cover the fittings evenly using an aerosol.

Coating instructions

After selecting the coloring composition, you can begin work. To do this, you need to collect tools, prepare a metal surface, and perform actions following the technology.

Tools and materials

Before painting work, you need to prepare consumables and tools:

• solvent for degreasing metal surfaces;
• metal cleaning brush;
• sandpaper
• coloring composition - it is better to choose products in aerosol cans;
• a grinder for cleaning large metal sheets;
• rags;
• roller, brush, if the paint is spilled into cans;
• plastic film to cover other surfaces.

If you need to paint a large area, you can use a spray gun with a compressor.

Paint brushes

Surface preparation

Do not apply enamel to an unprepared surface. Before this you need to perform several steps:

• Use a brush to clean the metal from dirt and deposits;
• You can remove scratches, bumps, and rust using fine sandpaper;
• sweep away any dust with a broom;
• moisten a rag in solvent and degrease metal surfaces.

After completing the preparation, you need to cover the walls, floor and ceiling adjacent to the stove with plastic wrap.

Work algorithm

When the paint has been purchased and the metal preparation has been completed, the main work can begin. Painting stages:

Open the paint and stir thoroughly using a wooden or plastic stick. If the coloring composition is too thick, it can be diluted with a solvent. The packaging indicates a substance that can be used to dilute the paint. If you do not take this information into account, you can ruin the paint composition. Using a brush, paint over awkward places and go along the edges. After this, paint over the main surfaces with a roller.

It is important to control the uniformity of the layer application and not leave any empty spaces.

After applying the paint, you need to close all rooms and windows. For some paints and varnishes, you need to heat the oven, since they only harden when heated.

Kindling the stove

How long does it take for the coating to dry and after what time can it be heated?

Many people do not know how long to wait until the protective coating is completely dry. This parameter depends on the type of paint. Information about complete drying is indicated by the manufacturer on the packaging of the paint and varnish composition. The average period of time required for the decorative layer to completely harden is 72–96 hours. If you heat the oven before this time period has expired, exposure to high temperatures will lead to the destruction of the decorative layer.

Frequency of work

The packaging of the coloring composition indicates the warranty period for maintaining the integrity of the decorative coating. Stoves made of thin sheet steel can collapse faster than the paint layer can come off. If the furnace equipment has thick walls, you need to prepare to replace the protective coating.

Features of painting a metal stove

To get maximum efficiency from using high temperature paint, the painting process should be carried out according to the rules. First of all, study the instructions on the package. And then the metal stove is prepared, and only then proceed to painting.

To get maximum efficiency from using high temperature paint, the painting process should be carried out according to the rules.

Coloring stages

The painting procedure includes the following steps:
Clean the surface of the stove using sandpaper or a stiff brush. This will allow the paint to adhere better. If rust is present, treat with a 5% sulfuric acid solution. When processing, you should protect your hands with gloves, and use a brush for application. Remaining acid should be washed off with a soap solution (50 g of laundry soap per liter of water). If there is no rust, you can skip this step. Apply a degreasing agent (solvent, white spirit) or simply wash the oven with soap and let it dry thoroughly. Heat-resistant paint is applied using a spray or brush. For greater stability, apply two or three layers, drying completely each time.

It doesn’t matter what material the stove is made of, iron, steel or cast iron, the process is the same. Before working with the aerosol, shake the can for a minute, after which you proceed to spraying

The mixture to be painted is applied from a distance of 20-30 cm to make a thin layer.

Do-it-yourself thermal paint, can it be done and how?

You can make heat-resistant paint yourself. The best option would be to prepare it from liquid glass and aluminum powder. The main thing is to understand that after the first fire, strong smoke may appear; the shelf life of such a coating is up to five years.

You can also use heat-resistant varnish; aluminum powder is added to it to obtain the desired effect. This option can withstand up to 350 degrees, and receives an anti-corrosion coating. Making paints is not difficult, the main thing is to get the necessary ingredients.

You can use heat-resistant varnish; aluminum powder is added to it to obtain the desired effect.

Rating of the best

Now let's look at what is the best paint for metal and rust for exterior use.

In first place you can put paint from the HAMMERIT company. This is a universal 3 in 1 composition. That is, it performs the functions of paint, primer and inhibitor. It can be used to paint metal surfaces, both clean and once coated with paint. This is the most durable rust resistant paint for exterior use. Although the manufacturer recommends using it indoors as well. And this is a big plus.

So, the advantages of this material:

• versatility;
• ease of application;
• good hiding power;
• long term protection;
• excellent external data.

The only downside is the high price.

So, the product from HAMMERIT can be called the best anti-rust paint for exterior metal work.

Rust paint HAMMERITSource m-delivery.ru

Second place goes to Dufa Retail Metall. The manufacturer produced this paint and varnish material to protect large metal structures. Hence the high demands on the paint itself. But life turned the situation around so that they began to use it in everyday life. In addition, it should be noted that this variety has an optimal price-quality ratio.

Today the manufacturer offers 9 shades in a semi-matte design. You can also add to the advantages the drying time - 2 hours, which is very good. High adhesive qualities, as well as high resistance to mechanical stress and sunlight. But the biggest advantage is the ability to apply paint to an unprepared surface, ensuring high quality of the final result.

ALPINA takes third place. Here are its advantages:

it is a three-component material: inhibitor, primer and antiseptic; absence of odor, which is very important when work is carried out indoors; economical in application; long service life; Can be applied directly over rust; relatively wide color selection.

As for the disadvantages, it is still the same high price; it is not always possible to find the required colors in the store.

ALPINA is one of the best paints for rustSource mirkrasok.ru

We give fourth place to “Belinka”. Let's start with the pros:

• high quality coating;
• applied directly to rust;
• high hiding power;
• dry within 2 hours;
• the paint is not afraid of the sun and moisture;
• The result is always a glossy surface.

And two disadvantages: unpleasant odor, high consumption of material.

And fifth place was taken by paint from the Euroclass company. By the way, it is a hammer. The biggest advantage of this material is its low price. Adding to the advantages is the possibility of use at low temperatures - down to -10C. The process of preparing a metal surface takes a minimum of time. This paint is often used for painting equipment located in factories and workshops. Therefore, she is not afraid of contact with moisture or oils. She is also not afraid of the sun's rays and sudden changes in temperature.

As for the minuses, there are also two of them:

• poor hiding power;
• smudges when paint is applied to a vertical surface.

Labeling and classification by field of application

Depending on their temperature characteristics, all fire-resistant paints are divided into the following categories.

• For industrial use - where temperatures can rise above 700 degrees, paints made from silicone resins are used.
• In domestic conditions, the temperature often does not exceed 100 degrees. Here, paints made from alkyd or acrylic resins are used, which make it possible to create a high-quality monolithic layer. As a rule, water heaters and heating radiators are painted with such paints.
• The next type of paint is designed for a temperature range from 400 to 750 degrees. They are produced mainly in cans in the form of an aerosol or spray.
• Paints designed for temperatures within 100-120 degrees. They are made from epoxy resins.
• Single-component paints, designed for temperatures in the range of 200-400 degrees. They can consist of either ester-epoxy or ethyl silicate resin.

Note! On the cans in which fire-resistant paints are sold, you can find markings consisting of numbers and letters. The abbreviation KO, for example, indicates that the paint is based on an organosilicon binder. The first number after the abbreviation indicates the degree of heat resistance (say, 8), while all subsequent numbers are just the design number in the catalog.

Below is a breakdown of the markings of heat-resistant enamels.

1. KO-811 is an excellent product for protecting steel and aluminum surfaces from corrosion. It differs in that it can be applied even at sub-zero temperatures. As a result, you can get an environmentally friendly coating that is resistant to humidity and temperature changes (by the way, at high temperatures the surface only becomes stronger).
2. KO-8111 – paint for metal structures heating up to no higher than 600 degrees. This enamel is especially resistant to various aggressive environments.
3. KO-814 can withstand temperatures from minus 60 to plus 400 degrees. It has increased resistance to saline solutions, petroleum products and mineral oils. Used primarily when painting hot steam lines.
4. KO-813 is an enamel that effectively protects metal surfaces and can withstand temperatures from 60 to 600 degrees. Protects the material from corrosion and is immune to humidity and temperature changes.

Classification

There are several types of heat-resistant paints. They differ from each other in composition:

1. One- and two-component polyurethane. They produce a glossy surface, dry quickly and are suitable for a wide range of ovens.
2. Silicone. This is the best choice for rooms with sudden temperature changes. After painting, the surface acquires a silvery tint.
3. Alkyd silicone enamels. Suitable for processing stone, brick, metal and other materials. Easily cope with aggressive environmental influences.
4. Water-based acrylic. The coating protects the metal from rust. Paint of this type is not suitable for rooms with high humidity - such conditions greatly reduce its service life.
5. Latex water-based. These dyes are used to paint brick and concrete stoves. The finished coating has excellent water-repellent properties.
6. Primer-enamel. Effectively and permanently protects any surface from corrosion, rust and high temperatures. Dries quickly. Primer enamel is suitable for rooms with high humidity and aggressive environments.

Heat-resistant paints also differ in their purpose:

1. For industrial plants where temperatures can rise to 700° C or higher. Such paint must contain silicone resins.
2. For residential premises. Here, the temperature of the painted surfaces never rises above 100° C, so it is better to use resin-based materials, such as acrylic.
3. For surfaces with temperatures from 400 to 750° C. These products are most often available in cans.
4. Dyes that contain epoxy resins are suitable for rooms with temperatures of 100-120° C.

What is better to choose

To preserve the appearance of stoves or fireplaces with a stone design, it is advisable to use a heat-resistant transparent varnish. It will emphasize the surface texture and color of the material, natural or artificial.

The coating on a small surface area can be applied using paint in an aerosol can. It dries quickly and does not require any skills in working with paints and varnishes. The spray is easy to apply to hard-to-reach and uneven surfaces. Compositions produced in the form of aerosols do not require pre-treatment of the materials being painted.

If at your dacha there is a need to paint a stove located outside, the best choice would be paint labeled KO-8101. It is resistant to weather conditions and can be used even in winter.

Pay attention to: Making non-toxic finger paints with your own hands: popular recipes for “edible” paint

The use of latex water-based paints with heat-resistant characteristics makes it possible to impart water-repellent properties to the surface of the stove. It is advisable to use such a water-based coating in the kitchen.

Why paint stoves and fireplaces?

A brick or plastered stove, as well as fireplaces, are treated with varnish or paint not only to preserve their visual appeal. The coating allows you to extend their service life and avoid aging of individual structural elements of heating devices.

Brickwork made from a material that is not uniform in color can be given an attractive appearance by coating it with heat-resistant paint. In this case, you can use several shades of the product at once. You can emphasize the attractiveness of finishing masonry by using colorless varnish. It gives brightness to ceramic materials.

It is advisable to paint a stone heating device in various cases:

• to protect the stove surface from household pollution, and things from traces of brick dust;
• to facilitate daily maintenance of the heating device;
• to bring the appearance of the stove in line with the overall interior design of the room.

Surface preparation

Heat-resistant paint is applied in the same way as other types of paint, but you need to carefully prepare the surface. Preparation stages:

1. First, the surface is cleaned of contamination.
2. Using a wire brush, sandpaper, and attachments for power tools, remove the remnants of old paint and rust.
3. The surface is washed with water and dried.
4. Next, it is degreased using a solvent (if the instructions indicate that you need to use a rust converter, then it is better to treat the product).
5. Allow time for the surface to dry.