Black waterproof leak sealing coating and polyurethane waterproof adhesive for repairing cracks in windowsills, roofs, and walls are waterproof materials used in buildings and roof repairs. The following is a description of them: Black waterproof and leak sealing coating: Black waterproof and leak sealing coating is a type of coating used for waterproofing and leak sealing on building surfaces. It usually has flexibility and weather resistance, and can form waterproof layers on different surfaces. The color of black paint helps to absorb heat, providing additional durability and waterproof performance. Window sills, roofs, walls crack waterproofing and leak sealing polyurethane waterproof adhesive: This polyurethane waterproof adhesive is a waterproof material specifically used to fill and seal cracks and joints in window sills, roofs, walls, etc. It has good adhesion and elasticity, and can adapt to the expansion and contraction of buildings under temperature changes. Polyurethane waterproof adhesive can effectively prevent water penetration and provide long-lasting waterproof protection. These waterproof materials can be used for waterproofing and repairing leaks in buildings and roofs. They can be applied to various surfaces such as window sills, roofs, walls, etc., providing reliable waterproof performance for buildings. When using these materials, please carefully read the product instructions and follow the instructions for correct construction and application. Please note that specific brands and models of waterproof coatings and polyurethane waterproof adhesives may have slightly different characteristics and uses. If you have specific needs or more questions, please refer to the relevant product instructions or consult professionals for accurate advice.