Varnish for concrete, granite, stone, sandstone and other similar materials is used not only as a decorative coating. Good varnishing reliably protects the material from external physical and mechanical stress. This type of protection of surfaces of structures made of mineral materials operated in a temperate climate is especially in demand.
- Types of varnishes for the treatment of stone coatings
- Polymer varnish
- Polyurethane varnish
- Silicone Acrylic Varnishes
- Compositions and properties
- Application
- Recommendations
They are used for processing internal and external stone surfaces of a building. These products are mainly resistant to moisture and temperature. They have a high level of wear resistance, as a result - a long operational period. What varnishes should be used for exterior and interior use?
to contents ↑Types of varnishes for the treatment of stone coatings
- Polymer varnish for stone. Among the most sought-after paint products for indoor and outdoor use. It has excellent strength, moisture resistance, wear resistance. It sets well, dries quickly, has high adhesive properties.
- Polyurethane varnish for concrete. By operational characteristics, it is little different from polymer coatings. The main advantage is water immunity. It is better to varnish with this product where surfaces are constantly affected by high humidity. Ideal for outdoor facade work, stone processing in pools, paving slabs.
- Silicone and acrylic compounds. They have high decorative quality, which distinguishes them from polymer and polyurethane mixtures. Most often used for interior work. Among the paint and varnish products are among the expensive goods. Therefore, it is irrational to use acrylic or silicone varnish for mineral materials in exterior decoration and for varnishing large areas. However, the products have increased wear resistance and durability.
Polymer varnish
This type of protective agent is used for coating with mineral components. These include bricks, concrete, etc. The main features of the polymer composition are decorative properties and increased wear resistance. The substance is well resistant to cold and moisture.
Over time, stones coated in this way do not fade and retain bearing capacity. Most often, polymer compositions are used in construction for exterior cladding. They can be used with natural materials and with artificial products.
All polymer varnishes are made of one-component substances that can dry much faster than other solutions. This is due to the small proportion of water components. Due to which, the substance can even be used for gypsum products.
to contents ↑The structure of the substance allows you to achieve a matte effect when applied. This is especially noticeable when adding paint to the composition of the solutions. Thus, you can achieve the appearance of any product with a design.
Polyurethane varnish
The substance can be used for all types of material used in the construction of buildings. The solution is an oligomer with polyurethane components. Consistency is added to the organic solvent. Due to this, the substance during curing forms a film of a transparent type. Adding paint can change color, which is convenient for choosing the same texture.
This type of varnish is used for outdoor applications. Varnishing products with a polyurethane substance allows to achieve the effect of wet stone.
High protective properties, make it possible to use the tool for coating concrete and brick. Material properties are great for artificial and decorative products. When combined, significantly increases the durability and wear resistance.
The advantage of polyurethane varnishes is their high moisture resistance. Therefore, it is rational to use such means to protect concrete, thereby increasing the anticorrosive properties of the structure and general waterproofing.
to contents ↑Silicone Acrylic Varnishes
The most popular protective equipment when working with interior decoration of buildings. The substance is suitable for decorative products from stone, brick and other materials. Due to its special properties, the structure coated with silicone-acrylic means does not turn yellow with time. The substance also forms a film that provides protection against moisture.
The basis of the solution is acrylic acid with the addition of acetylene. Due to this, the varnish is odorless, safe for use in rooms with living people and has high protective properties.
It can be used with any materials, even gypsum or metal. Adding special colors allows you to achieve the necessary texture and gamut. Most often used for work with artificial materials.
The use of silicone-acrylic varnishes is not recommended for outdoor use. The protective characteristics are not much different from polymeric or polyurethane substances, but the cost is much higher. The most rational use of acrylic and silicone varnishes is the coating of walls made of artificial material and concrete floors that are subject to severe wear.
to contents ↑Compositions and properties
Polymer, polyurethane, silicone or acrylic is a type of varnish composition. The composition may also include substances whose task is to create a special decorative effect of the coating. Distinguish:
- glossy and semi-glossy;
- matte and semi-matt.
The first two decorative types of varnishes are used to obtain the effect of "wet stone". But matte or semi-matt varnish for concrete floors is ideal for finishing stone floors in areas with high traffic.
On matt surfaces, the mechanical operational impact is not so noticeable.
The properties of this group of paints and varnishes (varnish coating of surfaces made of mineral materials) are, in principle, similar. Separately, you can highlight, for example varnish for fireplaces and stoveswhere the temperature threshold of stability is from -40 ° C to + 250 ° C. Or super-wear-resistant varnish for horizontal stone surfaces (production, retail space, warehouses, public buildings with high traffic).
Properties of varnishes for stone:
- high moisture resistance;
- resistance to the influence of aggressive environments: synthetic, organic, alkaline, acidic and so on;
- good adhesion to the base material, deep penetration into the materials (enhances the wear resistance of minerals);
- wear resistance, impact strength;
- resistance to low and high temperatures;
- incombustibility, low combustibility;
- durability.
Application
Do not forget that all these varnishes are synthetic mixtures. Therefore, personal protective equipment does not hurt. When carrying out internal work, as well as after completion of the processing of the premises, it is necessary to carefully ventilate.
The surface to be treated should be preliminarily prepared for staining: clean, dust, dry, possibly degrease, prime. The maximum air temperature during work should not exceed + 35 °.
The quick-drying polymer composition can be applied with a brush or roller, also by airless or pneumatic spraying. In the last two cases, the substance should be diluted to a working viscosity. Acrylic, polyurethane, silicone varnishes are also applied with a similar painting tool.
It is recommended to cover the treated surface in at least two layers, especially if the stone surface has a porous structure.
Varnishes for mineral materials extend the life of the room or the building itself. Therefore, it is so important to approach the choice of funds with special care. Before buying, you need to determine which of the proposed varnishes is more suitable for your case, to calculate the expense, the cost of preparing and performing work. Special varnishing of concrete-stone surfaces will provide long-term and high-quality protection during operation.
to contents ↑Recommendations
When working with concrete, it is better to use polyurethane products. It will be justified to apply to the foundation and load-bearing walls, since the substance has the highest moisture protection among other varnishes.
Acrylic and silicone materials are excellent for products made of artificial material and interior walls. They enhance the aesthetic appearance and provide enhanced protection.
Polymer varnish is much cheaper and has the widest application. It can be used both for outdoor work and for interior decoration of any materials.
Please advise the brand of varnish for outdoor concrete work? Application is planned on the sidewalk made using printed concrete technology using toppings
We painted with ordinary acrylic varnish. Nothing holds on. Looks nice)