DOWSIL 791 Silicone Weatherproofing Sealant is a specified, premium performance weather sealing product specifically designed for general glazing and weather sealant in curtain wall and building facades. It is a one component, neutral cure sealant with 50% movement capability and an excellent unprimed adhesion to a wide variety of construction materials and building components. This makes it ideal for expansion, connection, perimeter and other movement joints.