Sachem SA3200 Silicone Building Sealant is a one part, neutral cure, versatile, architectural grade silicone sealant that exhibits outstanding physical properties for projects and general building construction uses. It has excellent weathering resistance, durability, sealing and primerless adhesive properties. Cured sealant bonds firmly to many substrates including painted and anodised aluminium, surfaces; and gives high performace silicone rubber sealant for curtain walls, weatherproofing and non-structural applications.