PU Foam Sealant 750ml Gun Type Expanding Spray Adhesive for Window and Door Frame Gap Insulation Sealing Tool Superior Thermal Barrier: Minimizes heat transfer for climate control. Sound Dampening: Significantly reduces noise transmission through joints. Multi-Substrate Bonding: Adheres to PVC, masonry, steel, and glass. Weatherproof Seal: Protects against wind, rain, and snow infiltration. Gun-Grade Control: Optimized for professional applicator tools. Sandable Finish: