Intumescent fire seals for fire door assemblies. An intumescent graphite based fire seal contained within a PVC sleeve for fitting into a rebate to either the leaves or the frame of a door. In the event of a fire the seal expands (intumesces) to many times its original volume and seals the gap around the door to provide a safe and effective barrier against the passage of fire. All  fire seals are supplied with a self-adhesive backing tape as standard to facilitate quick and easy fitting.