The waterproof of metal roof has always been a thorny problem, but now with this waterproof lotion, everything will be solved. It has amazing outstanding performance, strong adhesion that can tightly adhere to metal surfaces, and is not afraid of wind and rain erosion. Excellent flexibility, adaptable to the thermal expansion and contraction of metals, without cracking or falling off. Efficient impermeability, preventing water infiltration, providing comprehensive protection for metal roofs. Whether it's scorching summer or freezing winter, it can play a stable role and protect your roof for a long time. What water-based lotion do you know? I know more about chemical products.