Lacquer heat-resistant for fireplaces and stoves: types, characteristics

Furnaces and fireplaces can be made of different types of materials. But to prolong the life and preserve the appearance of these structures will help the varnish heat-resistant. Such a finish lining should have fireproof and fireproof characteristics.

Total information

The varnish is heat-resistant, it is also fire-resistant, - a solution that does not support combustion. In its composition includes resins silicone, diluted in the solvent. Most often it has a transparent color, but sometimes impurities are added to obtain the desired shade.

It is used for processing various types of surfaces, including for brick, stone, metal, ceramic tile, plaster. In some cases, they are also used for coating wooden bases. The varnish is heat-resistant and gives a shine and preserves the original texture, color. Protects against fire and destruction of the facing layer.

For what it is necessary to varnish furnaces and fireplaces

At a temperature above 80 ° C there is a sublimation of dust, while harmful substances are released. To maintain the cleanliness and environmental compatibility of the environment inside buildings, paint and varnish solutions are used to facilitate the care of fireplaces and stove constructions. It is also recommended to make designs with simple geometric shapes, which prevents the accumulation of fine dust particles in the kinks. These measures help to avoid harmful consequences, and also facilitate the care of structures. It is much easier to remove dust and dirt from the varnished surface. In addition, the risk of fire is reduced.

It is necessary to consider options for varnishing.

Lacquer KO-85 - technical specifications

Such a solution is based on polyphosphonium siloxane and polybutyl methacrylate resins. This varnish is heat-resistant and has the following advantages:

• It is possible to work at minus ambient temperatures.
• It gives the surfaces increased waterproof properties even when applying one layer.
• Resistant to high temperatures. In the process, the protective film does not burst, it does not creep.
• Withstands the temperature difference from -40 to 300 ° C.
• Used for processing not only the masonry itself, but also seams, which also prevents the destruction of structures.
• High drying speed - up to 30 minutes. Depending on the environmental conditions. The recommended temperature is + 20 ° C.
• Resistant to ultraviolet radiation.
• High refractory properties. Does not support burning.
• Durability, retains its properties for 20 years.
• Absence of sharp odors. After complete drying, they disappear completely.

As can be seen, the KO-85 lacquer has the required characteristics in order to use it in corrosive environments.

Lac-815 - technical specifications

This solution is based on polyphenylsiloxane and glyptal resins. After drying, it has the same properties as the previous composition, but it has a number of differences:

• The time of hardening of one layer is from 30 minutes to 2 hours. Full hardening occurs after calcination of the surface at a temperature of + 150 ° C.
• Withstands higher operating temperatures - up to 350 ° C. Such a heat-resistant varnish for furnaces is suitable as no other. They can also cover the furnace zone, since it has greater thermal stability.
• Withstands the temperature difference from -40 to 350 ° C.
• The service life of these coatings is up to 15 years.

Some of the characteristics are changed for the better. Some features are controversial, such as a longer hardening time.

Silicone Enamel

At the heart of such funds is lacquer-85 or 815, but with the addition of aluminum powder. Given the characteristics, it is possible to single out the advantages that such enamels possess:

• Resistant to a sharp temperature drop. Withstand range up to 60 ° C.
• Water resistance, which is inherent in the varnishes underlying the composition.
• Resistant to aggressive environment. Do not change color under the influence of ultraviolet radiation.
• Large range of colors.
• Can be used in the range from -20 to + 40 ° C.
• High anti-corrosion properties.

As you can see, the organosilicon enamel retains practically all the positive properties of its bases. Therefore, such mixtures have found wide application both in industry and in private construction. Most often they are used for outdoor works. If applied in enclosed spaces, respiratory protection should be provided.

Applications

Any organosilicon varnish is used to cover the outer surface of furnaces and fireplaces in residential premises, as well as in baths, saunas. Moreover, it can be used for street stoves, barbecue. This allows waterproof and refractory characteristics of such products. Moreover, the varnishes described are often used for outdoor work, because they are resistant to ultraviolet radiation, and at the same time are not afraid of direct precipitation.

Although such a varnish for the fireplace and stove is designed as an option for exterior and interior decoration, it is often used for other materials. This tree, plaster, concrete, stone. It should be noted that such compositions are still positioned as a heat-resistant varnish for the metal. They perfectly protect the surface from corrosion. Therefore, they often cover the metal parts of furnaces and fireplaces.

These solutions are used as modifying additives in alkyd, acrylic and other compositions, which gives them some of the advantages, including resistance to aggressive media.

Heat-resistant lacquer-85 is used as a base for quick-drying enamel KO-814. A product with the marking 815 is the basis of the refractory enamel 813. These solutions and their derivatives are used in the processing of oil pipelines, machinery mechanisms, car parts operating at elevated temperatures.

Technology of work

It should be understood that, as in the case of any finish trim, the surface is prepared before coating. Carefully cleaned from dirt, dust. The metal parts are degreased. It is recommended that the substrate be primed before the finish coat. Next, prepare the paint for application. The organosilicon varnish is thoroughly mixed until the formation of bubbles ceases. Work can be done by brush, roller, pneumatic spray.

The first layer is applied. The time for drying is given. In the case of lacquer-85, you only need to wait 20-30 minutes. For the paintwork with the marking 815, the setting time is from 30 minutes to 2 hours, depending on the ambient temperature. It is recommended to apply up to 3 layers. It should be noted that the lacquer-815 completely hardens at the temperature of 150 ° C, so it will be necessary to calcine.

The total film layer should not exceed 40-50 microns. If this value is exceeded, there is a risk of cracking the coating.

Recommendations for selection

In fact, the market is not limited only to the above-described compounds, there are others. For example, latex, acrylic, polymer. When choosing a solution, the following data should be taken into account:

• The location of the object, which is subject to processing. Will it be indoors or outdoors. And maybe a sauna or a sauna. Depending on this, one should pay attention to moisture resistance, resistance to ultraviolet radiation.
• The temperature to which the product will be subjected is the design. Pay attention to the permissible range of operating temperatures.
• Presence of smells, pouring rate.
• The material that you want to protect. Pay attention to the adhesion of solutions to this or that base. You may need to buy a primer that will be compatible with both the substrate and the coating solution.

If you choose the right paint, it can provide long-term protection of the surface from various factors. In favor of heat-resistant varnishes, we can say that they are manufactured in accordance with GOSTs, and therefore are fireproof. This is one of the main qualities required for finishing the furnaces, fireplaces.

So, we found out what a heat-resistant varnish is.