Pipe Oversleeve TENMAT

The Firefly OverSleeve is a universal, one-product-fits-all solution for the firestopping of insulated metal pipes. The thin and flexible intumescent is quickly and simply wrapped directly on top of pipe insulation without the need to cut back, ensuring that thermal and vapour seal performance in maintained. The red branded foil can be easily checked and identified on site to confirm that firestopping is in place. The unique Firefly intumescent material rapidly expands to crush and seal off the insulation to provide up to 120 minutes fire resistance to pipes ranging from 15mm up to 219mm diameter.


  • 3mm x 180mm x 1000mm – 5 metre lengths per pack
  • 3mm x 280mm x 1000mm – 5 metre lengths per pack
  • Other sizes available upon request, contact us for more information.
  • Full Scale BS EN1366-3 tested
  • Quick and easy to install – no special tools required, and can be retrofitted
  • Supplied in 1 metre lengths, to be cut to required quantity
  • Low thickness – allows installation in tight gaps
  • Highly flexible
  • Maintains vapour seal
  • Red in colour – can be easily identified and checked as a fire stop product

Test Approvals


Fire Test Approvals

BS EN 1366-3: 2009
Constructions Covered = Plasterboard Partitions, Solid Walls, Ablative Coated Fire Batts
Insulated Pipes Covered = Steel 15mm up to 165mm, Copper 15mm up to 108mm with Rigid Phenolic Pipe Insulation and Glass Mineral Wool, various thickness, check with TENMAT for details
Fire Ratings: Up to EI120

All reports available upon request


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Pipe Fire Sleeves - TENMAT

The Firefly 109 CE Marked Pipe Fire Sleeves provide up to 4 Hours Fire Resistance to various plastic & metal pipe and PVC vent duct penetrations. The Fire Sleeves have been fire tested to EN 1366-3:2009 & BS 476. The European Technical Approval (ETA-12/0332) and EC Certificate 2812-CPR-0341 enables the range to be CE Marked and used throughout the EU. The EN fire testing included pipes and ducts tested with Uncapped/Uncapped (U/U) pipe/duct end configuration as required for ventilated systems.

The Firefly 109 Pipe Fire Sleeves are particularly suitable for use in plasterboard partitions, but can be used in blockwork walls and floors. One length of Fire Sleeve can replace two collars in wall constructions. The Sleeves do not require any additional metal sleeving. The unique intumescent material is vacuum formed to shape which ensures controlled sealing of the plastic pipe or duct.

Assessed for installation on

  • Plasterboardclad steel or timber stud partitions
  • Masonry Walls & Floors
  • Mineral Fibre Batts (BS Only)

Availability: To suit pipe sizes 15-169mm (PVC, HDPE, Copper, Steel)

  • CE Mark Approved
  • Up to EI120 Minute Fire Rated in Partitions
  • Up to EI240 Minutes Fire Rated in Blockwork
  • Specifically tested on PVC Ducting with wall thicknesses of 1.5mm – 2.0mm
  • Acoustic, Thermal & Vapour Seal
  • Simple & quick to install, no screws or support needed
  • No Metal Sleeving required
  • Cost effective alternative to Fire Collars
Pipe Fire Sleeves - TENMAT




Fire Test Approvals

BS EN 1366-3: 2009 / EN 13501-1
Constructions Covered = Plasterboard Partitions, Solid Walls and Floors
Fire Ratings: Typically EI120 up to EI240 minutes

BS476: Part 20: 1987
Constructions covered – Plasterboard Partition, Mineral Fibre Batts, Solid Walls and Floors
Fire Ratings: Up to 120 minutes – Integrity & Insulation

All reports available upon request
Assessment Reports:
ETA-12/0332 – BM Trada
A03187 Rev F – Chiltern International Fire/BM Trada

Classification Reports:
CR12001A – Chiltern International Fire/BM Trada
CR12001B – Chiltern International Fire/BM Trada
CR12001C – Chiltern International Fire/BM Trada


Test Reports:
IF02045 AR1 – Chiltern International Fire/BM Trada
IF02080 – Chiltern International Fire/BM Trada
IF02087B – Chiltern International Fire/BM Trada
IF03030 – Chiltern International Fire/BM Trada
IF04040a – Chiltern International Fire/BM Trada
IF09045 Rev A – Chiltern International Fire/BM Trada
IF11049 – Chiltern International Fire/BM Trada
IF11059A Rev B – Chiltern International Fire/BM Trada
RF11067 Rev A – Chiltern International Fire/BM Trada
IF11082 Rev A – Chiltern International Fire/BM Trada


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