Our fire door sealants are intumescent, formulated to expand when exposed to heat, forming a barrier that helps contain fire, smoke, and toxic gases. They are used to seal the gaps, joints, and service penetrations around fire doors, frames, and timber screens, making them an essential part of passive fire protection in both residential and commercial buildings.

The range is led by intumescent acrylic sealant, fire, smoke, and acoustic rated and offering up to 4 hours of fire resistance, available in a choice of colours and in 310ml and 600ml cartridges. It also includes a fire door silicone sealant for sealing around fire-rated doorsets and a professional applicator gun, so you have everything needed to complete a compliant installation. The correct sealant always depends on the door or frame's certified specification.

Why choose Qdoors fire door sealants

1. Intumescent door sealants that expand to resist fire and smoke.
2. Fire-, smoke-, and acoustic-rated, with up to 4 hours of fire resistance.
3. A choice of colours and sizes, in 310ml and 600ml cartridges.
4. Fire door silicone sealant and applicator gun available to finish the job.

What are door sealants used for?
Door sealants fill the gaps and joints around door frames, service penetrations and timber screens. The intumescent type used on fire doors expands when exposed to heat, sealing the gap to help stop the spread of fire and smoke and maintain the integrity of the surrounding structure.

What is the difference between a sealant and an intumescent strip?
A sealant is a gun-applied paste used to seal gaps and joints, for example, between a frame and the wall, while an intumescent strip is a pre-formed strip fitted into the edge of the door or frame. Many fire door installations use both. You can see the strips on our Seals page.

How much fire resistance do the sealants provide?
The intumescent acrylic sealants are fire-, smoke-, and acoustic-rated and can provide up to 4 hours of fire resistance, depending on the application. Always follow the door or frame manufacturer's certified specification.

What colours and sizes are available?
The intumescent acrylic sealant comes in colours including white, brown, grey and orange, in 310ml and 600ml cartridges, so you can match the surrounding finish and choose the right volume for the job.