Everbuild Fire Mate Intumescent Sealant Grey 295ml (Pack of 6) Everbuild Fire Mate is a four hour rated, one part, emulsion acrylic based, intumescent Acoustic sealant that gives a firm yet flexible seal to joints in a variety of fire rated structures. The product, in suitably designed joints, will resist the passage of fire for up to 4 hours. The selected fillers used in this formulation also make it suitable for use as an acoustic sealant. Fire Mate Applications: - Sealing joints, voids and irregular holes in fire walls, partitions and other structures; also for maintaining the integrity of pipes and cables that penetrate them. - For internal perimeter pointing of fire rated door and window frames. Fire Mate Features: - When exposed to heat, it swells greater than.