Soudal B2 Genius Gun Fire & Acoustic Expanding Foam 600ml

Soudal B2 Genius Gun Fire & Acoustic Expanding Foam in a 600ml aerosol can is a one-component, self-expanding polyurethane foam designed for sealing, filling, and insulating where enhanced fire protection is required. Developed for professional passive fire protection, it provides a reliable barrier against the spread of fire, smoke, air, and moisture in structural gaps and penetrations. The foam cures with ambient moisture to form a dense, semi-rigid cellular structure offering both fire resistance and acoustic insulation. Once cured, it remains stable under temperatures from -40°C to +90°C, maintaining structural integrity and long-term adhesion to most construction substrates including masonry, timber, and metals. Equipped with the patented Genius Gun adapter system, the 600ml can allows precise, single-handed application with full control over flow and dosage, reducing waste and ensuring even filling of cavities. The formulation is completely free from HCFC and CFC propellants, providing a more sustainable, environmentally responsible alternative. With an expansion rate of approximately 135% during curing and minimal post-expansion once set, Soudal B2 Genius Gun foam ensures consistent joint sealing, excellent acoustic reduction (58 dB), and thermal conductivity of just 35.4 mW/m·K.