List of featured suppliers of SEALANTS Mastic: by Special Function: Intumescent on Building Products Index
Sealants and mastics that are classified by their special function as intumescent are materials that expand when exposed to heat or fire. They are commonly used in buildings to seal gaps and joints, preventing the spread of fire, smoke, and hot gases. When exposed to high temperatures, these sealants and mastics form a thick, insulating layer that provides protection for the underlying materials. They are an important component of passive fire protection systems and are used in a variety of applications across the construction industry.