Waterproof coatings can be divided according to different classification standards, mainly including the following types:
Classification by performance:
Flexible waterproof coatings: Based on organic materials, they have good elasticity and extensibility, and can adapt to slight deformations of the base layer. Common types include polyurethane waterproof coatings, acrylic waterproof coatings, and spray polyurea waterproof coatings. Polyurethane waterproof coatings are cured into films through chemical reactions, have high strength and good water resistance, and are suitable for various complex base layers. Acrylic waterproof coatings are suitable for outdoor waterproofing projects with their excellent weather resistance and chemical corrosion resistance. Spray polyurea waterproof coatings are suitable for high-end waterproofing fields with their high tensile strength and low temperature performance.
Rigid waterproof coatings: Based on cement, they have high strength and rigidity, and are suitable for parts that need to bear large loads. Common types include polymer cement-based waterproof coatings and cement-based penetrating crystalline waterproof coatings. Polymer cement-based waterproof coatings are suitable for indoor waterproofing projects such as bathrooms and kitchens, while cement-based penetrating crystalline waterproof coatings are suitable for long-term water-soaked environments such as basements and tunnels with their excellent impermeability and self-healing ability.
Classification by material composition:
Polyurethane waterproof coating: It is a prepolymer formed by addition polymerization of raw materials such as isocyanate and polyether, and is processed with catalysts, anhydrous additives, solvents, etc. It has high strength and good water resistance.
Polymer cement-based waterproof coating: The main ingredients include cement, polymer latex powder, quartz sand, fillers and additives, etc., which are suitable for indoor waterproofing projects such as bathrooms and kitchens.
Cement-based penetrating crystallization waterproof coating: It forms a waterproof layer through hydration reaction and penetrating crystallization, and has excellent impermeability and self-healing ability.
Classification by film-forming material:
Organic waterproof coating: It is based on organic materials, such as polyurethane, acrylate, etc., and has good elasticity and weather resistance.
Inorganic waterproof coating: It is based on cement or penetrating crystallization materials, and has high strength and impermeability.
Other classification methods:
Solvent-based waterproof coating: It is formed by solvent volatilization, dries quickly, and has dense film formation.
Water-based waterproof coating: uses water as the medium, is environmentally friendly and can be applied in humid environments.
Reactive waterproof coating: solidifies into a film through chemical reactions and is suitable for complex bases.
These classification methods help us better understand the diversity and scope of waterproof coatings. Choosing the right waterproof coating can effectively protect the building structure and improve the comfort and safety of the living environment.
