fischer fire retardant foam B2 contains fire retardent additives. To form a fire seal and obtain fire rating approval the foam must be used in conjunction with fire rated silicone FFRS or intumescent acrylic such as fischer FiAM to produce a fire barrier. The foam is ideal for all kinds of filling and sealing tasks.
It is perfect for filling gaps between walls and ceilings, openings in walls and gaps around window and door frames etc. The foam can be easily extruded either by hand or gun and it hardens via chemical reaction when exposed to atmospheric humidity.