Dowsil™ 781 is a one-part silicone sealant, which has excellent adhesion to a wide range of non-porous surfaces, including: glass, aluminium, painted surfaces and composite boards. Excellent resistance to ageing, shrinkage, cracking and discolouring. Suitable for glazing applications, weather sealing of sheet cladding and general internal sealing applications. Tack-free in one hour with a working time of 5-10 minutes. Skin over time is 14 minutes. WRAS approved for use in contact with potable water once cured. Conforms to ISO 11600-F&G-20LM.