Our invisible waterproof caulking agent contains polyurethane, siliconized and acrylic. It can be ductile, reduce cracking, and ensure the integrity and continuity of the waterproof layer. Extend the service life and resist erosion from harsh environments. Its usage is very simple: 1. Keep the construction surface dry and free of water stains; 2. Use a brush to evenly apply the waterproof glue on the construction surface, apply a small amount several times; 3. Ventilate for 18-24 hours. It has excellent anti-aging properties and can maintain long-term waterproof effect without frequent maintenance. Resistant to temperature differences, adapt to changes in the four seasons, and maintain a stable waterproof effect. 1set Invisible Waterproof Caulking Agent Gap Repair Content: 132g Ingredients: polyurethane, siliconized, acrylic