Special size intumescent fire blocks

Special size intumescent fire blocks


  • £26.03 (Ex. VAT)

The Fire Seal Shop currently stocks the widest range of intumescent air transfer blocks on the internet.

When installing ventilation, air conditioning, ductwork or simply cutting holes for ventilation within a compartment wall, the integrity of the building must be retained. They offer a low maintenance, low cost answer and can give up to 60 minutes fire integrity in accordance with British Standard BS 476 Part 20

Furthermore, they give excellent free air flow during normal conditions and benefit from being maintenance free due to them having no moving parts.



  • Low cost
  • Certified up to 60 minutes fire integrity (up to 300x300mm)
  • Easy fit & once fitted low maintenance
  • Fire tested in compliance with BS 476 Part 20

* Due to the technical nature of our products they are designed to be installed by a professional.
* Actual product may vary from images.
** All information given is for guidance purposes only. Information is offered in good faith but cannot be used in place of current test evidence.
*** Diagrams not to scale.
**** Information is to the best of our knowledge and we reserve the right to change specification without notification.

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