Our water and leak proofing materials include acrylic， polyurethane and butyl adhesive. Before it cures， the invisible water repellent can penetrate into the inside of the material. After curing， it can produce hydrophobicity， adjust surface tension， and produce crystallization in contact with water. It can effectively plug the leak crack， so that the water droplets float on the surface， so as to achieve the waterproof effect its use method is very simple: Clean the construction surface to ensure that the surface is free of moisture. Apply the product directly to the construction area with a brush. Wait for 24 hours to dry and do not touch water during this period. The waterproof layer can be formed after curing for a period of time. During this period， do not contact water and on the surface and inside of the structural material， form a layer of insoluble waterproof polymer compound with a thickness of several molecules， which is a network of silicone film. This resin film has the advantages of waterproof， impermeable， moisture-proof， rust-proof and anti-pollution.