SCNK 1000g Transparent Waterproof Coating Agent, Super Strong Waterproof Insulating Sealant, Invisible Waterproofing Sealant for Roofs, Walls, Indoor and Outdoor Use. Transparent Repair Leak Waterproof Adhesive: Our clear waterproof sealant glue each 1 kg covers about 14 sq ft (1.3 m²), can be applied 2-3 layers.