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