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.