Paste strong self-adhesive aluminum foil checkered leak-proof tape butyl tape waterproof leak-proof tape water pipe leaks catch leaks daylighting cover roof iron wall cracks leak-proof rubber. It can maintain flexibility and adhesion, can withstand a certain degree of displacement, and has good follow-up to deformation. 2) Waterproof, sealing and chemical resistance, strong anti-ultraviolet (sunlight) ability; long service life. 3) Easy to use, accurate dosage, reduce waste, and cost-effective. 4) Does not contain any solvents, safe and environmentally friendly. 2. Main purpose 1) The overlap between the corrugated iron sheet steel plate and the daylighting cover, and the connection between the pipes of the falling patio 2) Doors, windows, concrete roofs, and ventilation ducts are sealed and waterproof.