GoBoard® Pro Sealant is a one component, moisture curing, permanently elastic silyl-terminated polyether hybrid sealant and adhesive that provides tenacious adhesion to GoBoard and other common building materials. Use GoBoard Pro Sealant to waterproof GoBoard* joints and fastener penetrations and adhere GoBoard to itself and other building materials. Because it contains no solvents or isocyanates, GoBoard sealant is environmentally friendly, non-toxic and exhibits minimal odor.