Permatex Clear RTV Silicone Adhesive Sealant is a general purpose, clear RTV indoor/outdoor sealant that seals, bonds, repairs, mends, and secures glass, metal, plastics, fabric, vinyl, weather stripping, and vinyl tops. It can be applied to horizontal or vertical surfaces. Permatex Clear RTV Silicone Adhesive Sealant is waterproof and flexible.