Everbuild EVBB2FIREHAN Fire Foam B2 is a quick setting one part polyurethane foam with fire resistant properties. The foam expands on application to up to 50 times its original volume and meets the requirements of DIN 4102 Part 1 for Construction Materials Class B2 Once cured, the foam can be cut, sawn or plastered over after only one hour providing the working temperatures (can and surfaces) are between +5 to +25c, ideally 20c. The high degree of fire rating slows down the passage of flames and smoke in comparison to standard B3 grades. Everbuild EVBB2FIREHAN is hand operated and is ideal for filling gaps around pipe entries through fire rated walls, to provide a fire rated seal around window and door frames, and electrical wire chasing prior to plastering. Where a fire rating is required, filling deep joints prior to applying sealant or plaster, and also irregular gaps in stone, brick, concrete, or plaster. It is ideal for fixing door frames, timber structures, windowsills, threshold