Our water repellent spray contains polyurethane, curing agent and surfactant. It can quickly repair cracks, strengthen the base surface, leave no obvious marks, reduce the base wear. Its use method is very simple: clean the surface of the base, keep it firm and clean, gently shake the product, remove the top cover, aim at the construction site, press the switch, evenly spray, and after a few minutes, the surface will form a solid sealing ring. And it can be waterproof and fill leaks.