DAP PREMIUM POLYURETHANE CONSTRUCTION ADHESIVE Sealants a one-part, moisture-curing, non-sag, elastomeric, commercial-grade sealant. It is specifically formulated to both provide a long-lasting, durable seal when filling exterior gaps, joints, and cracks, and act as an adhesive for light and medium duty bonding applications. This pro-grade sealant offers superior adhesion to most substrates and remains flexible to withstand up to +/-35% joint movement when installed into a properly prepared joint. Handles foot and vehicle traffic and may be used above or below waterline — even in potable water applications.