List of featured suppliers of SEALANTS Mastic: by Special Function: Intumescent BS 476:1987 Part 20 on Building Products Index
Sealants and mastics with special function of intumescent BS 476:1987 part 20 are materials that are designed to expand when exposed to heat or fire. They are used to seal joints and gaps between various construction materials to prevent the spread of fire and smoke. These sealants and mastics have been tested and approved according to the British Standards Institution's BS 476:1987 part 20, which sets forth requirements for the fire resistance of building materials and structures.
