List of featured suppliers of SEALANTS Expanding Polyurethane Foam Fire Rated BS 476 Part 20 1987 on Building Products Index
Sealants are materials used to fill gaps and joints in order to prevent air, water, and other substances from passing through. Expanding polyurethane foam is a form of insulation that expands when exposed to air, creating a tight seal. Fire rated BS 476 part 20 1987 refers to a standard for materials and products that have been tested and certified to resist fire for a specified amount of time.