DAP Premium Polyurethane Adhesive Sealant is a low modulus, one-part, moisture-curing, commercial grade sealant. It is specially formulated to provide a permanent, watertight seal when filling gaps, joints and cracks. This durable, high performance sealant offers superior adhesion to most substrates without the use of a primer. It remains permanently flexible to withstand up to 50% total joint movement when installed into a properly prepared joint.