TENMAT’s Firefly 108 Fire Stop Block is a unique, compressible and fully intumescent alternative to traditional fire pillows. The Fire Stop Block can be supplied in up to 1 metre lengths and can be cut to size on site. This ensures maximum flexibility and minimum wastage compared with intumescent fire stop pillows. The material can be installed within and around various openings and electrical penetrations including cable trays, cable baskets and both PVC and steel electrical cable trunking where intumescent fire pillows are traditionally used.

The product is easily identified on site and can be added and removed as required making this an ideal option for both permanent and temporary fire protection applications. This electrical firestopping solution provides up to 120 minutes fire integrity and insulation rating (EI120).

Availability: 30.0 x 150.0 x 1000mm strips, see below for typical usage.

  • 2 Hour Fire Rated
  • Cut to size
  • Minimum wastage
  • One size suits all – simple to order and stock
  • Flexible
  • Easily stacked – Square edges
  • Removable
  • Easy to identify due to its red coating.


Typical Usage

Service penetration opening (mm) Typical usage
150 x 50 0.3 lengths
100 x 100 0.3-0.4 lengths
150 x 150 0.75-0.9 lengths

Test Approvals


Fire Test Approvals

Tested to BS EN 1363-1:1999 for up to 120 minutes
Test Report No: IF011059 Chiltern Int. Fire
EI120 on up to 100x100mm PVC Trunking
EI120 on up to 150x150mm Steel Trunking
E120 on Cable Basket and various Cable Types

For specific fire insulation ratings contact Tenmat

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