Heat resistant paint for oven

Any heating installation located in a residential building should look like a common interior, and requires periodic re-ordering. The heat-resistant paint for a stove or fireplace is designed for this purpose - such compositions cover both metal surfaces and brick walls. And if the surfaces of the furnace do not require frequent restoration, then cast iron and steel elements, such as doors, mantels, reinforcing strips and latches, need to be put in order regularly.

Furnaces Painting or varnishing of surfaces is carried out not only to maintain an aesthetic appearance, but also to maximize the service life and the entire design of the furnace or fireplace and its individual parts. Therefore, if any solid fuel device is installed in the house, it is necessary to know which heat-resistant compounds are used to treat its surfaces.

General concepts of heat-resistant paints

To ensure that the paint applied for a long time does not lose its original qualities under the influence of hightemperature, termresistant paints are manufactured using a special technology. They include protective components, thanks to which the processed brick walls of stoves or fireplaces, and even outdoor barbecue complexes, are able to withstand aggressive external factors such as moisture, atmospheric precipitation, dirt and dust. On the metal elements, a layer is formed, capable of securing them, among other things, also from oxidative corrosion processes.

Almost all compositions for staining furnaces and fireplaces are made in the form of suspensions based on heat-resistant varnishes containing silicone and silicon.

As mentioned above, all parts of the structure are to be painted, but for metallic small elements and large surfaces special types of paints are made for extremely high temperatures. Such compounds are suitable not only for furnaces, but also for braziers, where the metal experiences maximum impact from contact with an open fire.

Other heat-resistant paints are specially made for the surface treatment of bricks or stone-finished.

Compositions for painting materials subjected to thermal exposure must withstand heating not less than 350 ÷ 400 degrees. So, even when burning ordinary paper on its surface, the temperature is + 380 ÷ 400 degrees, on an intense flame when burning firewood it reaches + 400 ÷ 450 degrees. Well and at application as coal fuel, in a phase of its flameless burning, on its surface the temperature is created, reaching to + 900 ÷ 1000 degrees.

Of course, the outer surfaces of the heaters are heated much less than the furnace, but in any case, you need to choose heat-resistant paints that can withstand from 400 to 550 degrees of heating.

Most manufacturers make compositions for different purposes, and their packaging is indicated by temperature parameters, which allows selecting the desired for either metal elements or for brick surfaces of the furnace.

Why do I need to buy heat-resistant paint?

It should be noted that heat-resistant paints always have a high enough price, and, wishing to save, some furnace owners try to use oil, enamel paints or water-based paints for painting its metal parts. However, you need to know how these compounds behave when heated:

. For example, an oil paint made from drying oil will first soften, and at very high temperatures it will begin to burn. Well, an unpleasant smell from her will come anyway.

- The usual enamel will dry up, lose elasticity and, accordingly, crack, while also producing an unpleasant "fragrance".

- A water-based paint applied by a thick layer, when the moisture evaporates from it, it quickly splits and falls off, and the thin layer is covered with a fine grid of cracks.

After two or three furnaces of the stove or fireplace, the usual colors will change color and get an unpleasant yellowness. In addition, we must remember that from the inside they will be adversely affected by rust, "eating" the paint and appearing outside. Such paints will not protect the heated surfaces, and possibly even damage not only the walls and details of the furnace, but also the health of people who will breathe caustic fumes.

In addition, such a coating is barely enough for even one heating season, and after that the paint on the metal, and possibly on bricks, will remain areas that will be difficult to remove due to the porosity of the material.

With brickwork, too, remove oil or enamel paint will not be easy, and paint it from above can not be, because it will still emit harmful substances and badly affect the upper updated layer. It will be necessary to polish the surface with a metal brush or grinder with a suitable nozzle.

Therefore, do not take risks, otherwise you will have to pay much more than the cost of high-quality heat-resistant paint.

Basic requirements for paints for furnaces and fireplaces

When choosing a heat-resistant paint, several factors should be considered:

• Stability of the composition to high temperatures. The maximum heating level is indicated on the package.
• Resistant to aggressive environment.
• Material consumption, i.e., the amount required for painting 1 m².
• Composition of colorant.
• Ease of use.

The heat-resistant LMC compositions are divided according to the base component, on the basis of which they are made:

• Acrylic base.
• Silicon-containing( potassium or sodium liquid glass).
• Epoxy resins.
• Silicone.

The basis of heat-resistant paint directly affects its performance:

In itself, the compositions made on epoxy or silicone base are not very resistant to high temperatures. Therefore, to strengthen the thermal resistance in the paint add aluminum or bronze powder, after which the composition can be used at temperatures up to 400 ÷ 650 degrees.

If you need to "strengthen" silicone paint only to 200 ÷ 400 degrees, then it includes polyurethane additives.

The heat-resistant paints are subdivided according to their purpose, that is, by the type of surface to which they are applied.

• Paint for brick surfaces.

furnace The following requirements are imposed on the heat-resistant paints used for the masonry covering:

- resistance to temperatures reaching up to 300 degrees;

- resistance to steam and moisture, especially for furnaces installed in bath rooms;

- resistance to cracking;

- resistance to burning out.

All these qualities are possessed by organosilicon compounds, such as enamels KO-168, KO-8101, KO-813, etc.

For furnaces and fireplaces made of bricks installed in living quarters, an aesthetic aspect is an important factor, as many heating installations play a decorative role in interior decoration.

For example, a fireplace or stove, finished with artificial or natural stone, which you want to keep in its original form without painting, are covered with a heat-resistant transparent varnish called "invisible".

• Paint for metal surfaces.

In recent years, the installation of steel or cast-iron compact furnaces and fireplaces is gaining popularity. They do not take up much space and look aesthetically and stylishly, decorating with their presence any interior.

This type of appliances, as well as the metal elements of brick heating plants, require a special approach in the choice of paint, since metals are quite "capricious" and rust can appear during operation. In addition, they are greatly expanded under the influence of high temperatures, and can also be destroyed by wandering currents. Therefore, heat-resistant compounds for metal parts should have the following qualities:

- the paint must withstand temperatures up to 750 degrees;

- when heated, the composition should not emit toxic substances and sharp unpleasant odors;

- the paint must have sufficient elasticity so that when heated and cooled it is "mobile" and does not crack;

- it is desirable that the paint has high anti-corrosion properties, which will allow it to be applied to a rust-free surface without prior priming;

- resistance to phenomena that affect color change - burnout and yellowing;

- for ovens installed in the open air, the paint is chosen to be resistant to negative temperatures.

- resistance to aggressive external environment, since the composition must reliably protect the metal from atmospheric moisture, water and active chemical compounds.

All these qualities are inherent in heat-resistant enamel paints KO-8104, KO-811 and others.

Characteristics of heat-resistant paints

Nowadays, a wide range of heat-resistant paints and varnishes of various manufacturers, both domestic and foreign, with a large selection of decorative designs, is placed in specialized stores. Above we mentioned some of the most popular heat-resistant paints suitable for brick and metal surfaces of the furnace. Now it is worth considering their characteristics in more detail.

• Enamel KO-8101

KO-8101 enamel is a paint that is produced by heat resistance at 400, 600, 800 degrees. It can be called universal, as it is suitable for application on various surfaces - it can be concrete, brick, metal - from elements of furnaces to radiators, structures located under the roof and under the sky.

For metallic parts, it is recommended to choose the anti-corrosion paint composition KO-8101 - it will allow to surface coating without preliminary preparation. After drying with heating, the paint does not emit harmful fumes, so it can be called a safe product.

The great advantage of this paint is that it can work with it even at negative temperatures.

Due to its high protective qualities and variety of colors, this enamel is able to satisfy the needs of the most demanding customers. The certified technology of its manufacturing allows the manufacturer to give a guarantee for a period of 15 years.

KO-8101 is produced by many Russian and foreign companies: Elcon, Termica, LKM SpetsEmal, Karst and others. All manufacturers adhere to the same manufacturing technology and recipes. A difference can only be the number of colors of the composition.

This enamel was tested at the Research Institute "Mosstroy" - for heat resistance, adhesion, waterproofing ability and resistance to aggressive media.

The solvents used for this paint are xylene and toluene.

The consumption of the composition with a three-layer coating of the surface is 120 ÷ 240 g / m².

The period of drying of the coating at a temperature of 150 ± 2 ° C - no more than half an hour, at 20 ± 2 ° C - no more than two hours.

This enamel can be applied by spraying using a spray gun, or by hand - roller or brush, in 2-3 layers, with drying of each of them from 0,5 to 2 hours, depending on the ambient temperature.

• Enamel KO-811

Heat-resistant enamel KO-811 and KO-811K is designed for painting steel and cast iron as well as titanium surfaces that can be heated to a temperature of 400 degrees. The paint is a suspension consisting of pigments dissolved in silicone lacquer.

This compound is most often applied by air-spraying. To do this, the enamel is diluted with a stabilizer of 100: 6 for a white paint and 100: 7 for other colors. The mixing process is carried out immediately before use, and the finished product must be used within 24 hours.

Enamel is applied to a metal surface that has been cleaned of dirt, grease, water-soluble salts and oils with acetone, solvents or other solvents. Before applying the paint, the metal is wiped with a clean and dry cloth.

The solvents used for this enamel are P-5A, toluene and xylene. The paint can be diluted: KO-811 by 30 ÷ 40%, KO-811K( white) by 70 ÷ 80%, other colors by 40 ÷ 50%.

Enamel consumption varies from 100 to 250 g / m² - depending on the color.

Drying time of the painted surface at temperatures of 200, 150 and 20 degrees - no more than 2 hours.

This heat-resistant paint is produced by Galakolor, Termika, OOO NPF Emal and other companies.

• Enamel KO-168

KO-168 enamel is designed for operation in conditions of temperatures up to 150 degrees, which means that during staining the furnace it can be used for brick surfaces and metal elements remote from the combustion chamber. Enamel performs not only protective, but also decorative functions, as it is produced in different colors. In addition to staining the oven, this paint is used for façade work, and is therefore ideal for finishing barbecue stoves located on garden plots.

. Under the conditions for the operation of painted surfaces, the paint will be an excellent protection for any material from which the furnace is built, as the coating has hydrophobic, moisture-resistant and frost-resistant properties. In addition, the paint has a high resistance to ultraviolet rays, which means that the enamel retains the original color for a very long period.

KO-168 enamel is also a suspension consisting of pigments, fillers and additives, mixed with silicone lacquer.

The paint consumption depends on the selected color:

- for red and white enamel - 150 g / m²;

- for yellow - 180 g / m²;

- for blue - 140 g / m²;

- for brown, blue, light green, beige - 130 g / m²;

- for green - 120 g / m²;

- for black - 80 g / m².

Enamel KO-168 is manufactured in ready-to-use form. If necessary, dilute it with solvents such as toluene or xylene.

The drying time of the enamel at a temperature of 20 ± 2 ° C is about 24 hours.

If the metal surface is painted, it must be cleaned from various contaminants and degreased - also with xylene, solvent or acetone, and then the surface is wiped dry. Staining with this composition can be performed at an air temperature of -30 to +40 degrees.

• Enamel KO-813 and KO-814

KO-813 and KO-814 enamels are produced on the basis of KO-85 and KO-815 lacquers using aluminum powder PAP-1 and PAP-2.They are designed to protect metal products from various contaminants, aggressive influences and mechanical damages. These heat-resistant enamels are able to withstand temperatures from -50 to +500 degrees.

The drying time of the enameled surface at a temperature of 20 ± 5 to 150 ± 5 degrees is about 2 hours.

Before using enamel, it is necessary to mix two components in certain proportions, so the KO-813 should consist of 94 parts of KO-815 varnish and 6 parts of aluminum powder. Paint KO-814 is mixed in proportions of 100 parts of KO-85 varnish and 5 parts of aluminum powder. The finished paint should be used within 8 hours from the moment of mixing.

To dilute this enamel, the same solvents are used: toluene, xylene and solvent.

Before applying the paint, the surface must be prepared, free from dirt and grease stains. Degreasing of surfaces is made by solvents used for paint dilution.

The prepared paint should be thoroughly mixed to a homogeneous state without sediments and lumps.

Today you can find other heat-resistant paints of domestic and foreign manufacturers, which have gained popularity due to high quality products.

• Heat-resistant paints "Tikkurila"

"Tikkurila" is a well-known Finnish company specializing in the production of various paints and varnishes. There are also heat resistant varieties in the assortment range - black and silver.

Silver version of the enamel consists of two components - varnish and aluminum powder. This composition is designed for heating up to 900 degrees, so it can be used for painting metal surfaces. The paint can be used for furnaces installed inside the house and in the garden area, as it can withstand any environmental impact.

Heat resistant black paint is only designed for surfaces heated to +400 degrees. It can be applied to the surface by spraying or by hand using a brush.

• Zerta enamel

Zerta is a Russian manufacturer that produces heat-resistant paint intended for the protection of metal surfaces, as it has pronounced anti-corrosion properties. However, such enamel can also be used for application to other materials.

The coloring composition is able to protect the entire structure and its individual elements from overheating, moisture and aggressive influences. It is designed for temperatures from -60 to +900 degrees. This paint is produced in cans for applying it with a brush, and in aerosol cans with a volume of 520 ml.

• Paint "NEW TON"

"NEW TON" is the enamel of the Ukrainian manufacturer, which is popular in the Russian market due to the high quality and relatively inexpensive cost of its products. Paint is produced in aerosol cans.

This heat-resistant enamel is used for the metal parts of the oven and can withstand a temperature of + 600 degrees. The composition of this paint includes anti-corrosion components that will protect metal surfaces from various external influences, from rust formation and from overheating. The paint after drying keeps its elasticity, and therefore does not crack and does not deform from temperature changes.

Before applying this formulation, the surface is degreased and dried, but it is not necessary to prime it before painting.

Then, the balloon is shaken well, and the enamel is sprayed to the surface from a distance of 250 ÷ 300 mm.

The paint reveals all its possibilities after the initial heating of the coated surfaces to +200 degrees for 20 ÷ 25 minutes.

In conclusion, it should be said that due to the variety of color design of heat-resistant enamels, several colors can be used to color the oven, which will make this a real interior decoration or a garden plot.

Since heat-resistant enamels are not cheap, before buying, it is worth paying special attention to their performance and application instructions, so you do not have to make a purchase again.

Video: aerosol heat-resistant paints "Bosny Plus"