GREAT STUFF™ Premium Bath & Kitchen 100% RTV Silicone is high strength one part, moisture curing, 100% Acetoxy RTV Silicone. Premium Bath & Kitchen 100% RTV Silicone is flexible and mildew resistant. Our high strength silicone has excellent adhesion to a variety of non-porous substrates such as aluminum, glazed ceramic tiles and glass. Also, it can be used for sealing and filling around doors, windows, trims, moldings and more.