WR Intumescent Tape

Quelfire WR Tape provides fire protection to cavities in situations where the cavity needs to be ventilated allowing air flow in normal circumstances but closing to give a fire resistant barrier in fire conditions.

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Features & Benefits

• Tested to BS 476: Part 20: 1987
• Up to 2.5 hour fire rating
• Allows cavity to be ventilated and allow air flow in normal circumstances.
• Quick & easy to install


Building Regulations require cavities to be stopped every 20 metres and when in line of a compartment floor or wall. In addition to this, there is often a requirement to provide through ventilation to the entire cavity. Quelfire WR Intumescent meets both requirements as it only occupies a minimal proportion of the cavity for its normal function, expanding to fill
the cavity in the event of fire. There are no published standards for fire testing of fire resistant cavities but Quelfire WR Intumescent Tape has been tested according to BS 467: Part 20: 1987 and met fire resistance requirements for up to two and a half hours.


WR Intumescent is a graphite based intumescent material. Its fire performance is not affected by the presence of atmospheric moisture or condensation. It is available in two sizes: – 60mm x 4mm and 30mm x 2mm. It is supplied with self-adhesive tape for ease of fixing, subject to satisfactory substrate. Where required: mechanical fixing using staples, nails, screws or proprietary moisture resistant building adhesives may also be used. When subjected to heat the intumescent material reacts producing a barrier of carbonaceous char or foam therefore stopping the fire from passing along or up the cavity.


Quelfire WR Intumescent Tape is expected to last the lifetime of the service installation. Quelfire WR Intumescent Tape is not affected by water attack.

Technical Support & Guidance

Should you require any further information regarding this product, please don’t hesitate to contact one of our specialists.

Application / Installation

Quelfire WR Intumescent Tape may be simply applied to a suitable surface in line with a compartment floor or wall. Due to changing temperatures and humidity which could affect the long term performance of the self-adhesive or nature of the substrate. Consideration should be given to fixing using staples, nails or screws. The size of WR Intumescent required depends on the width of the cavity and fire resistance requirements. See the table below:


Product CodeWR Intumescent Tape Sixe (mm)Supplied LengthsMaximum Cavity SizeFire Rating
WR2/30/502 x 3050m Rolls20mm2.5 Hours
WR4/60/14 x 601m lengths50mm1.5 Hours