Intumescent Rubber Smoke Seal: Intumescent Rubber Fire Door Seal: Intumescent fire door seals fit into a rebate on the fire door or frame. They expand to many times the original size and fill the gaps around the door with a flame-tight seal for 30 or 60 minutes, depending on width. The key points for passive fire protection products are : Prevent the spread of fire, smoke and hot gases through a building by containing it in the Compartment of origin. Maintain the integrity of escape routes from a building. Reduce loss or damage to property from the effect of fire and smoke. Maintain pressure differential between compartments and ventilation channels. Standard Sizes Available : 22 x 4 mm 22 x 6 mm 10 x 4 mm 10 x 2 mm Key: Intumescent Rubber Seals in Pune, Intumescent Rubber Smoke Seals in Maharashtra, Intumescent Rubber Fire Door Seals in India, Intumescent Rubber Smoke Seals.