Fire Door & Gap Seals

Fire door gap seals are intumescent sealing products designed to close the gaps around fire doors and frames, helping maintain the fire resistance and compartmentation of a building during a fire. They expand when exposed to heat to fill spaces that would otherwise allow smoke and flames to pass through, improving the performance of fire doors and helping them meet regulatory standards.

Why Fire Door Gap Seals Matter

Fire doors must have consistent, controlled gaps around the door leaf and frame so they can close properly, but if gaps are too large, fire and smoke can leak through. Intumescent gap seals expand under high heat to seal these spaces automatically, supporting the door’s fire‑rated performance and helping protect occupants and property.