What are polyurethane waterproof coatings?
Polyurethane waterproof coating can be divided into one component and two components.
One component polyurethane waterproof coating is a reactive moisture curing membrane waterproof coating, also known as moisture curing polyurethane waterproof coating. When in use, it is applied to the waterproof base course to react with the water in the air and solidify to form a tough, soft and seamless rubber waterproof membrane.
2. High strength polyurethane waterproof coating is a two-component reaction curing waterproof coating. High strength polyurethane waterproof coating is a two-component chemical reaction curing isocyanate sealed prepolymer, which is made by the shrinkage reaction of polyether and isocyanate. Category B consists of plasticizer, curing agent, thickener and filler. When in use, components A and B are evenly mixed in proportion, coated on the surface of the waterproof base course, and often heat crosslinked and solidified to form a highly elastic, high-strength, durable rubber elastic film to play a waterproof role.
3. The waterborne polyurethane waterproof coating is generally one component polyurethane waterproof coating, and the oil-based is two-component polyurethane waterproof coating; Relatively speaking, the performance of water is a little unsatisfactory, but the price is cheaper, which mainly depends on the use environment. However, waterborne polyurethane waterproof coating is more environmentally friendly.
The classification of polyurethane waterproof coatings has their own advantages, different effects, and different functional requirements. Therefore, customers need to select products according to their own application scenarios.
