Choosing paint for the stove
The operating temperature for standard metal paint does not exceed 40-50 ℃, so you cannot paint surfaces that are too hot - it will bubble up, lose its original color and may begin to smoke and smell unpleasant. Therefore, in this case, you need to use only special heat-resistant paint for stoves.
Which of the proposed paint options to choose will depend on the area of its application. Thus, a metal sauna stove can heat up to 600-800 ℃ or more - at the epicenter of combustion the temperature is even higher. But its outer walls may not heat up so much - it all depends on the design. Therefore, you need to know how to properly install a stove in a bathhouse. If we are talking about a brick oven, then its surface does not warm up above 200 ℃.
Please note that heat-resistant paint must be suitable for interior use. And for sauna stoves you need paint with moisture protection.
A little about the types of heat-resistant paints
Painting very hot surfaces of metal furnaces can only be done with heat-resistant, heat-resistant and fire-resistant paints. But fire retardants are not suitable in this case - they are used for other purposes. When heated to 200 ℃, fire-retardant paint swells and blocks the access of oxygen to the structure, protecting it from destruction in fire. Let's take a closer look at the types of paints.
So, heat-resistant paint for stoves is used at a temperature threshold of 600 ℃. Such compositions are suitable for painting metal elements of stoves and fireplaces, as well as for metal heating appliances. But for sauna stoves they use several different types of materials - heat-resistant enamel, which is designed to heat the surface to 800-1000 ℃.
Fireproof paint for metal products can withstand exposure to open flames. Therefore, its temperature threshold is even higher. However, due to the very high cost, it is not advisable to use such compositions at home.
Another type of paint is high-temperature. Their area of application is painting heating batteries and a number of engine components. As a rule, such compositions are operated under heating conditions no higher than 200 ℃. High-temperature paint for brick stoves can only be used if it is necessary to tint the surface or paint the seams. Metal stoves cannot be painted with it.
For brick stoves, you can also use heat-resistant varnish. Its operating temperature is 250-300℃. After treating the surface with this varnish, it becomes shiny and brighter.
Applied factory markings
An alphanumeric designation is used to designate heat-resistant paints. The marking of the compositions in question is carried out as follows:
- Two letters “KO” indicate that the thermal paint is made on an organic silicon basis.
- After the letter designation there are numbers. The first one talks about the purpose of the composition, the subsequent ones are catalog data.
For example, the designation KO-811. This composition is intended for steel, titanium, aluminum alloys that need to be protected from weathering. This type of enamels is characterized by high heat resistance, and also by the fact that they can be used at low temperatures. As a result of using KO-811, a surface is obtained that is resistant to temperature changes, heat or high humidity.
KO-813 paint is used to protect surfaces that may be exposed to temperatures up to 500 degrees Celsius. KO-8111 can withstand exposure to 600 degrees Celsius. In addition, such chemical compositions are resistant to aggressive chemical agents.
How to choose the right one
To choose the right paint for the stove, you need to carefully consider the label, which says what surface it can be used for, for example, heat-resistant paint for metal products. Often this information is printed in large font and is difficult to miss. In cases where the scope of application of paint and varnish products is wide, this is also written on the packaging, but in small print. Be that as it may, such information must be indicated on the packaging, as well as the name of the manufacturer. If this data is not available, there is no need to purchase such a product. It is possible that this is a counterfeit product that may pose a threat to your health.
For metal sauna stoves, use only moisture-resistant compounds, otherwise they will not last long on the surface.
Packaging
You can purchase heat-resistant paints in various packaging - these can be spray cans or jars. From cans, paint is simply sprayed over the surface, and from a can, paint is used with brushes, rollers or special sprayers.
The volume of the cylinder is usually 500 ml. Cans are produced in 400 g, 800 g, 2.5 kg and 5 kg. There are also large buckets of 5-15 kg and barrels.
Exactly how to apply thermal paint is everyone’s personal choice. For some, it will be more convenient to use a brush or roller, while others will opt for a spray can. In the latter case, the material consumption will be significantly lower, and the paint will apply more evenly and evenly.
Which fireproof paint to choose for the stove
Paint for metal stoves must be selected with a temperature threshold of 600 ℃ or more. Here are a few of the most famous brands with a brief description of each.
Heat-resistant enamel of the CERTA brand, produced by the domestic manufacturer Spectrum. It is designed for use in the temperature range of 65-900 ℃, and its application can be carried out even in frosty temperatures of -30 ℃. The consumer is offered a total of 26 shades of paint, including turquoise, blue and yellow. True, not all colors withstand equally high temperatures. Thus, the most heat-resistant color is black (up to 900 ℃). Behind it are white, gold, brown, copper, red-brown, green, blue, cyan and turquoise (all of them can withstand up to 750 ℃). All other shades can be used at temperatures not exceeding 400-500 ℃. This paint is produced in cylinders, cans and buckets of various sizes.
Termal paint from the Finnish manufacturer Tikkurila. It is made on the basis of alkyd resins and is available in black and silver. It is able to withstand the heating of the metal at the stage when it turns red. When using this paint on sauna stoves, it does not crack or peel for about 3 years. Please note that if you heat the painted surface to 230℃, it will dry in 1 hour. This is a prerequisite for its polymerization.
Hansa brand heat-resistant metal stove paint comes in 16 colors and can be used in temperatures up to 800℃ to paint stainless steel. It goes on sale in barrels, cans and cans.
Heat-resistant paint of the Kudo brand, produced in Russia, is a silicone enamel for metal products. It is designed to heat the surface up to 600 ℃ and is available in 20 shades, including white, black, red and silver. Sold in 520 ml bottles.
Aerosol paint Bosny. Available in two versions - for heating up to 650 ℃ and up to 200 ℃. It fits well, does not change color for a long time and does not crack. This brand of thermal paint is used for painting metal, plastic, ceramics and glass, wood and fabrics. Pay attention to this brand, since glass paint is rare to find. The container capacity is 400 ml.
Hammerite brand heat-resistant metal paint has one feature. It can even be applied over rust without first cleaning the surface. However, beware of its contact with diesel fuel, gasoline and grease. The paint can withstand heating up to 600 ℃ and is available in 250 ml cans. It is applied with a brush.
Anti-corrosion heat-resistant ELCON enamel can withstand temperatures up to 800 ℃, including sudden changes. Used for painting concrete, brick and metal. Available in cans in a large number of colors. There is also an aerosol version of ELCON paint in 520 ml cans - it is designed to heat up to 700 ℃.
Paint for metal and other surfaces KO-8111 “Termika” can withstand up to 600 ℃. In addition, it has a protective effect against stray currents, salts, chlorine, solutions, oils and aggressive substances. Used for painting fireplaces and stoves. In baths, it is better to use the KO-8101 brand and KO-8104 primer from the same manufacturer. In addition to heat resistance, this paint is also moisture resistant.
Rust-Oleum heat-resistant paint is designed for very high heat - up to 1093 ℃. In addition, it protects against gasoline and oils. Release form: aerosol can. It comes in matte white, gray, black and transparent.
All of the above options are successfully used for painting brick and metal heating stoves and boilers. And some are also suitable for sauna stoves.
What are heat-resistant enamels made of?
The whole secret of heat-resistant paints is that they are produced on the basis of silicone elements, to which polymer, fillers and coloring pigments are added. Thanks to these qualities, this paint is able to protect any surface from corrosion, even in an aggressive environment. Polymers that are part of any heat-resistant paint contain high strength parameters and are not capable of destruction. These polymers are based on atoms of silicon, oxygen and other organic radicals.
But this is not a complete list of components that can give the paint heat-resistant properties. The composition also contains aluminum powder, which can increase the overall heat resistance. In terms of service life, such paint and varnish material can last 20 years. The drying time of the layer, wear resistance, as well as elastic parameters are influenced by the percentage of organic resins that are part of the enamel and, of course, by the method of application.
Enamels that are used for painting fireplaces and barbecues can withstand high temperatures of 300 degrees. This is usually enough for a home grill.
Preparing the surface for painting
Before painting a metal stove, it is important to properly prepare the surface. In some cases, no prior preparation is required, but in others, you must follow the instructions on the label.
Typically, preparation includes:
- Cleaning the surface from traces of oils and grease, old coating, water-soluble salts and other things.
- Removing rust down to gray metal using sandpaper, a grinder or drill attachment, or a sandblaster. Sometimes the surface can be coated with rust converters, but this must be indicated on the paint package. Upon completion of treatment, the surface must be washed and dried. Rust must be removed completely, down to the smallest specks.
- Degreasing the surface with xylene or solvent immediately before painting. Further coloring should be carried out no later than 6 hours after treatment outdoors or 24 hours indoors.
In each case, the required number of paint layers and their direction are purely individual. If more than one layer is required, they are applied in different directions so that the paint goes on more evenly.
The temperature and drying conditions of the paint, as well as the gap between application of layers, are always indicated on the label. Following the manufacturer's recommendations will allow you to obtain a coating that will last the specified period.
Operation results
When properly applied high-quality heat-resistant paint, the metal structure does not burn or rust. The paint lasts 4-5 years. With active use, it lasts for 2-3 seasons, depending on weather conditions. To make a metal kebab maker last longer, it is covered and stored in a dry place.
The exterior brick barbecue is repainted every season. In winter, due to changes in temperature and humidity, the coating cracks. Before applying new paint, the old layer and dust are removed with a brush.
Coloring will definitely extend the life of the kebab maker. And you already know how to paint the grill.
Choosing paint for a brick stove in a bathhouse
The outer surface of a brick sauna stove does not heat up too much, as a rule, no higher than 70-80℃. Near the cast elements, a brick sauna stove may heat up a little more, but in any case not higher than 200 ℃.
In this case, the following brands of paint are suitable:
- Ecoterra heat-resistant paint is designed to heat up to 400 ℃ and is used on concrete and ceramic surfaces. The paint is matte, red-brown.
- A brick sauna stove can be painted with anti-corrosion heat-resistant ELCON enamel. It can heat up to 700℃. The same company also produces heat-resistant varnish of the KO-85 brand, which is intended for surfaces with a temperature of no more than 250 ℃. It is successfully used for decorative finishing of the surface of a brick oven.
- Heat-resistant paint Certa is also suitable for painting sauna brick stoves.
- Bosny heat-resistant aerosol is ideal for glass and ceramic surfaces, including brick.
- KO-8101 paint is equally applicable for both metal and brick stoves.
It is worth noting that in addition to painting, there are a number of other ways to decorate a brick oven externally. To refine the brickwork, it can be plastered and whitewashed with chalk or lime. If, after plastering, the surface is puttied and covered with water-based emulsion, it will be more beautiful and will not stain clothes. The unpleasant odor of the water-based emulsion will completely disappear after drying completely and reappear. In addition, it allows you to tint the stove in any shade or apply any decorative painting in the future.
For metal elements, paint must be selected with a heating temperature of up to 800 ℃ or more, that is, the same as for a metal furnace. Before painting, parts must be cleaned of dirt, rust and old paint. Painting tape is placed on top of the brick around the steel elements and you are ready to go. Please note that when working with aerosols, the spray surface will be larger, so the area of protected areas must be increased so as not to subsequently repaint the oven itself.
What to consider when choosing
The simplest decision that can be made in this situation is to buy special heat-resistant paint for barbecues and stoves at a hardware store. But, unfortunately, such specific paint usually has a very high price. Since marketers are confident that if a person is able to maintain a fireplace or stove, then he will be able to purchase expensive heat-resistant paint. But even those people who have such financial capabilities also want to save money. Therefore, we recommend using similar materials, because there are ordinary paints that can withstand fairly high temperatures. It is also possible to paint the grill with regular pentaphthalic or oil paint. But only if the paint material contains drying oil, then after some time the coating may darken. But basically the heat-resistant composition includes silicone or silicon.
Let’s say you need to paint a barbecue lined with bricks, one side of which is located on the street, and the other remains in the building. In this case, two or even three types of paint are used, since paint used for interior work will crack very quickly on the outside. That is why it is necessary to paint with heat-resistant compounds with high anti-corrosion parameters. Also, anti-corrosion paints are designed for both metal and concrete, since these materials have different properties, which means they need different protection. But there is the most affordable option - universal paint, which is intended for any type of surface.
The price of heat-resistant material depends largely on the composition, which affects the heat resistance of the paint. Today, paints that are created on an organosilicon basis are very popular. Such paints are intended not only for painting stoves and barbecues, but also for painting heating appliances.
