Intumescent seals are a critical safety component for fire-rated door sets, designed to help slow the spread of fire and hot gases through the gaps around a door. Installed into the rebate of a timber door edge or frame, an intumescent strip expands when exposed to high temperatures, helping to seal the perimeter of the door and support the performance of FD30 and FD60 fire doors (where specified as part of a tested doorset).
At Roundtower Hardware, our range includes intumescent fire door seals and combined fire and smoke seals to suit common timber fire door applications, including single and double leaf doorsets, single and double action doors, and both latched and unlatched configurations. These products are ideal for new build installations and retrofit upgrades, offering a straightforward way to maintain compliant fire-stopping at door edges when installed in the correct groove size and location.
Whether you’re specifying intumescent strips for timber fire doors, replacing worn door edge seals, or selecting the right option for a fire door frame rebate, you’ll find dependable, spec-friendly solutions here—available in practical lengths for trade and site use.
