Intumescent fire door seals are fitted to the perimeter of a fire door frame (or door) to maintain the doors resistance to fire. Supplied in two popular formats;
Fire Only. This intumescent strip seal has no brush seal to prevent the movement of smoke in the event of a fire and provides protection only from fire when exposed to heat.
Fire and Smoke. This intumescent strip seal incorporates a brush seal and a nylon fin to prevent the passage of smoke through a door in the event of a fire as well as providing a fire seal when exposed to heat.