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The Penosil Fire Stop Intumescent Sealant 680 - White x 300ml is a safety essential for construction and refurbishment projects. This high-quality intumescent sealant expands when exposed to heat, effectively sealing off fire and smoke paths. The product comes in a box of 24, each tube containing 300ml of the sealant. Its easy to apply with a standard sealant gun, cures to form a robust seal resistant to the passage of fire and smoke, and its white colour makes it a versatile choice for various applications.