Experience the unparalleled efficiency of irefoam B1 Handheld, a fast-setting one-part polyurethane foam endowed with fire-retardant properties. This cutting-edge foam expands up to 50 times its original volume upon application, meeting the rigorous standards of DIN 4102 Part 1 for Construction Materials, achieving Class B. Additionally, it complies with BS476 Part 20 (1987), attaining fire ratings of up to an impressive 4 hours. Once cured, this foam allows for easy post-application modifications, such as cutting, sawing, or plastering, after just one hour, provided the working temperatures (can and surfaces) are within the range of +5 to +25C, ideally 20C. Trust irefoam B1 Handheld for swift and reliable fire-retardant solutions in construction applications. Features and Benefits High degree of fire rating: slows down the passage of flames and smoke Quick setting - can be cut, sawn or plastered in 1 hour Economical in use - expands up to 50 times its original volume Fills irregular and broad gaps where most conventional fillers would fail Possesses insulating and sound deadening properties Typical Applications Gaps around pipe entries through fire rated walls To provide a fire rated seal around window and door frames Electrical wire chasing prior to plastering, where a fire rating is required. deep joints prior to applying sealant or plaster irregular gaps in stone, brick, concrete or plaster