What paint is applied to the exterior wall for waterproofing?
1, acrylic waterproof coating, which needs brushing or sanding after brushing to increase its friction, is easy to stick to bricks, and is especially suitable for being used as waterproof material for walls. Acrylic waterproof coating for exterior wall waterproofing is a one-component water emulsion waterproof coating based on pure acrylic polymer and additives. It is pure liquid and can be used when the cover is opened. It can be easily combined with ground cracks to form a solid waterproof layer.
2.k 1 1 universal waterproof coating, characterized by rigid waterproof material and outstanding bonding performance. K 1 1 universal waterproof coating is often used for exterior wall waterproof coating. It is a two-component waterproof material, which is composed of polymer emulsion and inorganic powder. Cement and selected timely sand are polymerized by a specific polymer, which not only forms a surface coating waterproof, but also penetrates into the substrate to form crystals to block the passage of water, thus achieving a double waterproof effect.
3.JS waterproof coating. The basic color of JS waterproof coating is mostly white, which has obvious heat reflection function. Compared with the traditional black roof, JS waterproof coating can play a better heat insulation effect. After being modulated into color, it can decorate and beautify the roof and external wall, and its comprehensive performance is superior. It is a new type of ideal environmental protection waterproof material promoted by the state at present. JS exterior wall waterproof coating is a kind of green environmental protection material, which has the advantages of environmental protection, stable performance, long waterproof life, good aging resistance, convenient construction, simple operation and strong adhesion.
4. Polyurethane waterproof coating can be used for waterproofing works such as roofs, external walls, non-drinking pools and retaining walls. Polyurethane waterproof coating for exterior wall is a kind of coating for both internal and external repair, with a thickness of about 3mm and an elasticity of over 300%. In use, any base material will not crack it, which has waterproof effect, but it also has its shortcomings. Polyurethane waterproof coating has a strong smell, which is unacceptable to ordinary people. It is difficult to use scraper in construction and the operation is complicated. It is a reactive moisture curing film-forming waterproof coating.
Selection skills of exterior wall coatings?
1, the exterior wall coating is not better than the interior wall coating, which can be repainted every year and cannot be used as an exterior wall.
2. Therefore, the selection of exterior wall coatings needs to be cautious. When choosing paint for exterior wall decoration, it is necessary to distinguish the type of building, whether it is multi-storey or high-rise, whether it is new or old, and the maintenance cycle. China has a vast territory, complicated climatic conditions and great differences in various climates. Acrylic emulsion thick exterior wall coatings (including multi-layer and sand wall exterior wall coatings) can be selected for decoration projects such as residential buildings, public and industrial buildings.
3. Solvent-based silicone modified acrylic resin exterior wall coating and solvent-based fluorocarbon resin exterior wall coating can be selected for all kinds of decoration projects with high requirements on stain resistance and weatherability.
4, must consider the local climate conditions, such as sunshine, wind and rain, temperature and humidity, etc. Coatings with good salt spray resistance should be selected for buildings in coastal cities; In areas polluted by acid rain, exterior wall coatings resistant to acid rain should be selected;
5. Exterior wall coatings with good mildew and algae resistance should be selected in rainy areas in the south. Exterior wall coating should be suitable for the construction environment. If the temperature is lower than 5℃, you can't use emulsion coating, otherwise the coating can't form a good film, and it is easy to crack and fall off. Solvent-based coatings should be selected.
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