The Premium Polyurethane Construction Adhesive Sealant as one part， moisture-curing， non-sag elastomeric commercial grade sealant which is specifically formulated to provide a long lasting， durable seal when filling exterior gaps， joints and cracks. This high performance sealant offers superior adhesion to most substrates and remains flexible to withstand up to plus or minus 35 percent joint movement when installed into a properly prepared joint.