1. The two-component polyurethane sealant is a reaction-curing type, and has two components of A and B. The component A is a milky white or light yellow viscous polyurethane prepolymer, and the component B is a black paste or liquid which is obtained by mixing and dehydrating a curing agent and an auxiliary agent, and has certain elasticity and cohesiveness after curing, Component A: Component B = 10: 0.8 to 1.2)


2, two-component polyurethane sealant principle: the adhesive surface must be neatly processed (can be used portable cutting machine, grinding wheel, just brush, etc.), so that the rubberized surface reveals a firm structural layer. The seam surface must be completely dry, clean and frost-free. All dust and cement slurry on the surface must be cleaned and cleaned. The rust layer of the metal surface and the protective lacquer also need to be removed. If the structure is not dry, it can be dried with a blowtorch. The porous surface needs to be primed before applying the glue. The primer needs only to be coated with a thin layer. After the surface is not sticky, the sealant can be applied.