Thermo™'s RTV Silicone Sealant is a one component, permanently flexible, RTV (Room Temperature Vulcanizing) mildew resistant silicone sealant that is the industry standard. The products tough chemical resistance makes it a worry-free solution for a wide range of applications. It provides excellent adhesion to sheet metal, aluminum, vinyl, glass, tile and cultured marble without the need for a primer. The product is engineered to cure rapidly when exposed to atmospheric moisture, to form a durable, tight bond that contractors and installers count on.