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Intumescent fire sleeve for plastic trunking

Product 110


Intumescent fire protection sleeves to protect plastic trunking

£0.00 ex. Vat


Intumescent Fire Sleeve

Intumescent fire sleeve for plastic trunking. Ideal for PVC and plastic trunking which pass through fire-rated block, brick, concrete, or plasterboard. In the case of a fire, the intumescent material will expand, thus sealing the gap and preventing fire spread. Specialised sleeves designed for electrical conduits are also available in this range.

  • Made of a fibre-free intumescent material which allows for the natural expansion and contraction of pipes and also gives protection from corrosion caused by contact with cement and other materials.
  • They also absorb heat to help prevent services, pipes and cables from overheating.
  • Highly flexible, moisture resistant and feature acoustic properties.


Specially designed passive fire range to meet Document B of Building Regulations, and also tested to European Standards. Explore our further range of Firoblok Sleeves and Ducting Protection online now.

Envirograf ® passive fire products carry the hallmark of excellence, reflecting the high standards that prevail in its laboratory, test rig, and manufacturing plant. Envirograf® passive fire products are subject to rigorous quality control which, at all stages, ensures products remain at the leading edge of fire containment technology. This quality has earned the company and its passive fire products a high reputation. With its operating system accredited to ISO9001.



– No more corrosion problems due to copper pipes having contact with concrete surfaces

– Meets all regulations

– Allows for expansion and contraction of hot pipes and gives up to four hours protection

– Easy to cut; no more sawing and de-burring steel pipes

– Can be cut with a knife and off-cuts can be taped together, leaving no waste

– Will last a lifetime in-situ and will not degrade or deteriorate

Application Instructions

Mark the outline for the Firoblok sleeve on the substrate.
Cut out the hole with a powered hole cutter or padsaw and clean down edges.
Fit the Firoblok sleeve over the vent and fit to the ducting or service passing through.
Push the assembly back into the substrate until flush.


Order References / Sizes

For plastic electrical trunking

Ref                Profile

110T11           25mm x 25mm

110T22           50mm x 50mm

110T33           75mm x 75mm

110T32           75mm x 50mm

110T42         100mm x 50mm

110T43         100mm x 75mm

110T44         100mm x 100mm

Available in 100mm, 150mm, 200mm and 500mm lengths.