Dow Corning 781 is a one component, ready-to-use silicone sealant, which offers fast cure and good weathering characteristics. The excellent adhesive properties of Dow Corning 781 make it suitable for use on aluminium, glass, formica and most other non porous surfaces. Fast cure - tack free in one hour. High modulus acetoxy cure type Listed by the UK Water Regulations Advisory Scheme (WRAS) for use in contact with potable water once cured. Conforms to ISO 11600-F&G-20LM Excellent weather resistance.