Den Braven Zwaluw PU-Foam 750

Den Braven Zwaluw PU-Foam 750 is a professional-grade, one-component insulation and construction polyurethane foam that cures via atmospheric and substrate moisture. Specially engineered for high-performance sealing, it creates a robust, airtight barrier within structural gaps, partition walls, ceiling joints, and door or window frame perimeters. It provides exceptional structural adhesion to heavy construction surfaces like concrete, brick, stone, plaster, wood, and metal, as well as uPVC and rigid plastics. The cured foam can be easily cut, sanded, plastered, or painted, making it ideal for deep gap-filling and technical pipe penetrations.