Fire rated polyurethane foam filler. Meets DIN 4102 B2 fire class and offers fire resistance up to 2 hours depending on joint configuration. Features an acoustic rating of 58 dB and an insulation factor of 36mW/mK. Suitable for interior and exterior use. This rapid curing foam provides excellent thermal and acoustic insulation properties, making it ideal for filling around door and window frames and pipe penetrations where B2 fire class is required. It offers excellent yield and adhesion on most substrates.