Black RTV Silicone Sealant 1. Waterproof sealant 2. For windows and door sealing 3. For interior decoration 4. 300ml/cart Black RTV Silicone SealantSealant Tech's black RTV silicone sealant is a type of single-component, neutral sealant. Superior resistance to most chemicals,free primer for most building materials.FeaturesGood adhesion for most non-porous building materials, Free primer.Non ...