1527 is a one-part RTV silicone adhesive/ sealant that cures on exposure to atmospheric moisture to form an elastic silicone rubber. 1527 is easy to apply and has excellent adhesion to many substrates. TYPICAL APPLICATION: Application for binding materials with differing thermal expanison coefficient, e.g. glass, metal, plastic. Adhesion to commonly materials including steel, aluminum, glass, plastics without primer.