QI Intufoam Linear Gap Seal is manufactured from compressible foam, impregnated with fire retardant chemicals. The foam is then bonded to a graphite based intumescent material to form a composite seal. In the event of fire this expands to maintain the fire stop seal.
View NBS Specification
Standards & Approvals
QI Intufoam Linear Gap Seal has been tested to BS EN1366-4 in both wall and floor construction as a linear gap seal.
For full details and performance refer to the relevant standard installation details or contact the Quelfire Technical Team.
Below is a summary of the available products and dimension details:
||Suitable for Gaps:
||Width of the Seal:
||10 to 25mm
||25 to 50mm
||25 to 50mm
||40 to 75mm
The Intufoam system comprises of 1 metre lengths of a compressible foam core faced with a flexible intumescent material.
Different products within the range have a different number of layers of materials, making them suitable for different size gaps and applications.
Intufoam provides a reliable, easily installed fire seal to resist the passage of fire through linear gaps between non-combustible surfaces where an element of movement may be required.
The product is tested as defined in the relevant test reports and subsequent standard installation details, generally between concrete surfaces and QuelStop Fire Batt. Its suitability for use in conjunction with other substrates is not something we could comment on and instead should be determined or verified by a suitably qualified fire engineer.
Typical instances where the Intufoam may be considered are as follows:
- Vertical joints in concrete walls.
- Horizontal joints in concrete floors.
- Head of wall to underside of a concrete floor.
- Head of wall as part of a QuelStop Fire Batt service penetration seal.
Intufoam’s excellent compression and recovery allows movement within the product, the minimum and maximum gap sizes are set out in the table below. In the event of a fire, the product will react and become a carbonaceous char sealing the gap.
Installation is by hand, the 1 metre lengths are simply compressed by hand and inserted in the linear gap where they will then expand holding themselves in place. Individual lengths should be installed with a tight butt joint, end to end. Where necessary to complete the length, Intufoam can be cut with a sharp knife or saw before inserting into the gap.
In some instances a single or double width seal is required and it may also be necessary to have the Intufoam set back from the exposed front face of the wall or floor, refer to the specific installation details for full details.