Brick is the most popular building material; it is used both for the construction of multi-storey buildings and for laying stoves and fireplaces. Such structures are distinguished by their strength, aesthetic appearance, and durability. However, due to atmospheric precipitation, seasonal temperature drops, cracks form on it over time, which gradually widen. In order to prevent the destruction of walls, the formation of fungus and mold, experts recommend using special impregnations and varnishes for brick bases. They help to maintain the attractiveness of the facade of the building, as well as improve its performance. Today in any hardware store you can find a huge assortment of paints and varnishes. Each of them has its own nuances associated with the application technique, consumption, operating conditions, as well as cost. In this article, we will figure out which brick varnish is best to choose in order to get the desired effect.
# 1. Types of protective materials
All varieties of paintwork materials have the following properties:
- Preventing the penetration of moisture, chemicals into the building material. Brick perfectly absorbs moisture, be it dew, rain or condensation. The lacquer coating is water-repellent, which improves the performance of the building.
- Strengthening. The agent penetrates deeply into the material, thereby strengthening it.
- High temperature protection. Heat-resistant varnish will eliminate the possibility of destruction of the furnace wall, which is constantly exposed to high temperatures.
- Resistant to UV rays. The paint and varnish layer favorably emphasizes the structure of the brick, making it more expressive. Based on the purposes of its acquisition, manufacturers offer matte, glossy, semi-matte and semi-gloss options.
- Preventing the formation of mildew and mold. In shady, damp areas of brick buildings, there is a high probability of fungus formation. The paint coat will help keep the building dry.
- Protection from dirt and dust. By applying varnish to the surface, a strong smooth film is formed on which dust does not settle.
Using varnish can improve the appearance of the brick wall. The choice of the appropriate option depends on where you will use it: for finishing external, internal walls or for processing fireplaces, stove structures.
# 2. What are the varnishes by composition
Brick varnish is a versatile product for protecting a brick base. But in order for the varnish to lie flat on the material and to fully fulfill its functions, it is necessary to choose it correctly, paying attention to its composition.
This is the most popular type of paintwork materials. The demand for this product is due to its versatility. It can be used on brick and concrete substrates. Polymer varnish can be applied at sub-zero temperatures and in rooms without heating. It is easy to apply, dries quickly and reliably protects the material from scratches, cracks, moisture and dust. The mixture can be used to protect interior and exterior walls. Due to the ease of applying the polymer composition, it can be used by both professional craftsmen and beginners. Polymer varnishes are affordable.
Silicone acrylic varnishes
This type of paintwork is suitable for interior walls. Silicone-acrylic mixture can be used to coat not only brick, but also concrete, ceramic tiles, drywall, metal. The composition is often used for application to decorative items.
Due to the presence of special polymers in the mixture, varnish can be of various shades. In addition to the protective layer, the wall treated with this compound can be transformed into any color, depending on your wishes.
Silicone-acrylic varnish protects the base from alkalis, acetone, oils. The only disadvantage of such mixtures is the price, which is much higher than polymer analogues.
It is a versatile product that can be used to coat interior and exterior walls. It is the polyurethane varnishes that create the “wet” effect on the brick base. They have excellent moisture-repellent characteristics, which is why they are most often purchased for treating external walls. The popularity of polyurethane varnishes is also explained by the fact that they can be used to process not only brick, but also concrete bases.
Heat-resistant varnishes for fireplaces and stoves
This is a separate category of paint and varnish materials, which differ in the characteristics of heat resistance, fire resistance. They are designed to prevent condensation from forming on the walls of stoves and fireplaces. Due to their high moisture resistance, such paints and varnishes are also purchased for decorating and protecting building facades.
These formulations are based on silicone resin and solvents. When penetrated into the material, they create a strong protection, preventing cracking and discoloration. But, at the same time, such varnishes are easily flammable, and it is necessary to work with them extremely carefully, observing safety rules.
In order to strengthen any paint and varnish, you can use special sealing impregnations. They are made on the basis of silicone and acrylic resins with the addition of aromatic, aliphatic solvents. Due to this composition, maximum protection of the paint and varnish for the brick base is provided. When using impregnation, deep penetration of paintwork materials into the building material is guaranteed.
In addition, sealants provide an extra layer of protection against seasonal rainfall, chemicals and UV rays. Many manufacturers also offer decorated options with a “wet stone” effect. The negative side of such impregnations is the use only for external or internal walls; they cannot be used in work with stove and fireplace installations.
No. 3. Russian or foreign, which brand is better?
On the shelves in hardware stores you can find a lot of paintwork materials with the same characteristics, but from different manufacturers. How not to get caught up on a bright label and get really effective formulations?
In the rating of the best paints and varnishes, this company takes first place. This is a German manufacturer, which is one of the oldest concerns in the world market for the production of paints and varnishes. The assortment of the company includes more than two hundred types of finishing compounds for working with various materials. The company’s products are successfully supplied to Russia and Ukraine. Pufas varnishes dry quickly, do not have strong odors, and are easy to apply. They are distinguished by high quality standards and corresponding prices.
This is an American manufacturer whose products have positively proven themselves among domestic buyers. The line of paintwork materials with the effect of “wet stone” for a brick base is especially in demand. Petri impregnations prevent dirt, deterioration of substrates and mechanical wear. They are also odorless and dry quickly.
In the Russian market of paints and varnishes, the Neomid Stone company won the greatest popularity. It produces high-quality impregnations, varnishes, in which there is no dangerous toxic odor. These products can be used without problems in small spaces. The following qualities are also characteristic of Neomid varnishes:
- Form style. The company offers matte and semi-matte coatings while others offer glossy and semi-gloss options.
- Reliability. The manufacturer has taken care of an increased level of moisture protection.
- Anti-fungal impregnation. The varnish creates a dense protective film that prevents the formation of fungus.
It is a Russian manufacturer that specializes in the development of heat-resistant compounds for fireplaces, stoves, and fireboxes. The products of this company are made from foreign raw materials. Paints and varnishes “Chief Technologist” dry quickly, but immediately after their application, an unpleasant toxic odor is felt.
The company offers several variants of compositions for coating brick bases: Protexil, Epoxol, Texil and Aquastone. Production technologies are Russian, and raw materials are foreign. High-quality KrasKo compositions have an affordable cost, which makes them popular with domestic consumers.
Rustins (United Kingdom)
The most popular among the compositions offered by this company is Brick Varnish (matte). It can withstand temperatures up to +150, prevents the appearance of fungus, cracks, does not lose color. But its cost is much higher than Russian counterparts.
This type of paintwork materials is specially designed for stoves, fireplaces and fireboxes. It is suitable for working with metal, stone, ceramic, concrete, brick and even wood substrates. Refractory varnish does not support combustion, reliably protects against fire and destruction. It can be applied even at low temperatures. It dries quickly, and the pungent smell quickly disappears. With just one layer applied, the surface will be reliably protected from moisture and condensation penetration.
No. 4. LMC selection criteria
The choice of the most suitable paintwork composition depends on the place of its application. When working with external walls, facades of buildings and street structures (gazebos, fences), it is necessary to give preference to products with an increased level of moisture protection, resistance to UV rays. Also, such varnishes should look spectacular on brickwork, without losing their decorating functions during the period of seasonal precipitation.
Other requirements are put forward for the compositions for fireplaces and stoves:
- No toxicity. The varnish should not have an unpleasant odor, as hazardous toxins can be released when heated.
- Heat resistance. For coatings of fireplace structures, only specialized compounds that are fireproof should be used.
For covering internal brick walls, it is better to give preference to acrylic or silicone compounds. The choice of such varnishes is large enough to choose the most profitable option.
No. 5 Recommendations for applying varnish on a brick base
When deciding to use paintwork materials in order to protect and decorate brick walls, it is important to remember that in order to obtain the desired results, one should not only choose the most effective tool, but also observe all the subtleties of the coating.
The varnish can be applied to walls in various ways: with a brush, roller or spray gun. Manufacturers insist that the composition should be applied in several layers (at least two). In addition, it is important to follow several important recommendations:
- The varnish should be applied at a temperature not lower than 10 not higher than 30 degrees.
- Each layer applied takes time to absorb and dry.
- It is possible to cover the brick base with varnish only after preliminary processing of the material.
Sequence of work
- Preparation of a brick base. The wall must be thoroughly cleaned of old paint, dirt, dust. This can be done with a building hair dryer, solvent. Excess cement can be knocked down with a hammer or chisel. Small cracks can be putty, then sand the surface with emery paper.
- Cleaning from dust and dirt. The base can be cleaned using a household detergent. This is necessary to remove salt stains, dirt and dust. After cleaning, the wall needs to dry.
- Deep penetration primer application. For greater efficiency, it is better to use the primer of the same company as the varnish. It can be applied with a brush or roller.
- Varnishing. Using a roller (bristle length 2 mm), a spray gun or a nylon brush, you can start varnishing the wall. The composition should be applied from top to bottom.
- Consumption. As a rule, for application in one layer per 1 m2, you need 100-200 grams of varnish.
The ideal time for varnishing is warm season and low humidity. This will allow the solution to lay down smoother, without streaks. Drying time for each layer is 1-2 hours, for quick-drying compounds – 30 minutes. It will take 1-2 days to dry the finishing layer.
To select the most suitable paintwork materials, it is important to take into account the following factors: the place of its application, protective characteristics, manufacturer, drying speed, decorating effects, cost, service life. Monitoring prices and performance can take you some time, but as a result, you can be sure that your walls will stand for many years without losing their aesthetics and functionality.