The Everbuild Firefoam B2 Expanding Foam (750ml) is a high-yield, polyurethane-based expanding foam engineered to provide effective fire-resistant sealing around gaps, joints, and pipe penetrations in building construction. Designed for professional builders, installers, and contractors, it helps compartmentalize spaces to slow the spread of fire and smoke while offering reliable thermal and acoustic insulation.
 
Formulated to expand rapidly upon contact with air and moisture, this aerosol foam fills irregular cavities, window frames, door frames, and service entry points completely. Once cured, the B2-rated fire-retardant compound forms a semi-rigid, cellular structure that can be easily cut, trimmed, plastered, or painted over to match surrounding finishes.
 
Supplied in a standard 750ml pressurized canister designed for use with a dedicated foam applicator gun, it ensures precise bead control and minimizes waste on-site. It serves as an essential compliance and insulation consumable for trade professionals requiring certified, dependable gap-filling performance in fire-rated structures. It expands on application to up to 50 times the can contents and meets the requirements of the test criteria for BS 476 Part 20.