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TESTED TO BS 476 PART 22/1987 (ISO 834) IN JOINT CONFIGURATIONS
Firestop 400 is a one part, fire rated intumescent acrylic sealant designed for internal perimeter pointing of fire rated door and window frames where the integrity of fire walls or partitions needs to be maintained. Under heat conditions it swells to produce a fire and smoke resistant seal. Firestop 400 does not emit halogenated by-products under fire conditions.
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