Intumescent MasticIntumescent mastics can be used for all building & constructions joints and normally consist of a single part; water based acrylic, (silicone available upon request) and is used to provide fire protection to gaps & movement joints. It also provides fire protection around service penetrations when used in conjunction with the Intumescent batts.

Key Features:

  • Up to 4 hours fire resistance
  • Suitable for gaps up to 50mm wide
  • Maintains substrate acoustic & air seal ratings
  • Reduces air leakage
  • Accommodates movement