Fire and Heat Sealants

Technical specification guidance

For new-build and retrofit projects, select fire and heat sealants against the project specification and the manufacturer's documented intended use. Do not assume that heat resistance alone establishes suitability for fire-stopping.

Before specifying, check the relevant product documentation for the substrates, joint or penetration type, joint dimensions, movement requirements, installation conditions and any tested system details. Confirm any required fire-performance classification against evidence for the proposed application; suitability depends on the complete installed system, not the sealant name alone.

Approved Document B reference (England): The official 2026 amendment booklet (PDF) sets out changes taking effect on 30 September 2026, subject to transitional arrangements. These changes concern common stairs and evacuation-lift design in blocks of flats; they do not certify individual sealants. Check the applicable guidance and project requirements with the responsible designer or fire-safety specialist, particularly for work to existing buildings.

This guidance is not a product approval or a statement that every product in this collection is suitable for every fire-stopping or high-temperature application.