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The waterproof effect of polyurethane waterproof paint is closely related to the number of layers applied. In building construction, it is usually recommended to apply 2 to 3 layers of polyurethane waterproof paint to ensure that the coating thickness is uniform and dense to achieve the best waterproof effect.

The drying time of polyurethane waterproof paint is divided into three parts: surface drying time (4 to 8 hours), actual drying time (24 to 48 hours), and complete curing time (7 days).

Polyurethane waterproof paint has high elasticity and ductility, which can effectively resist deformation caused by tiny cracks, settlement or thermal expansion and contraction on the surface of buildings. It can stretch or shrink with the movement of the substrate surface, avoiding water penetration through cracks.

The types of polyurethane waterproof coating are: 1. Single-component polyurethane waterproof paint 2. Two-component polyurethane waterproof paint 3. Oil-based polyurethane waterproof paint 4. Water-based polyurethane waterproof paint 5. Modified polyurethane waterproof paint