Intumescent Fire and Smoke seals for Fire door assemblies. Our Intumescent graphite based Fire seal contained within a PVC sleeve fitted into a rebate to either the leaves or the frame will in the event of a Fire expand (intumesce) to many times its original volume and seal the gap around the door to provide a safe and effective barrier against the passage of Fire, Smoke and hot gases. For more information visit: http://www.fireproofpaint.co.uk/