Tenmat’s Firefly 108 Fire Stop Block is a unique, compressible and fully intumescent alternative to fire pillows/intumescent pillows. The Fire Stop Block is supplied in 1 metre lengths and can be cut to size on site. This ensures maximum flexibility and minimum wastage compared to traditional fire 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 fire stopping solution provides up to 120 minutes fire integrity and insulation rating (EI120).

  • 2 Hour Fire Rating
  • Alternative to fire pillows
  • For use in solid masonry walls only
  • Easy to stack
  • Compressible material
  • Used with PVC/Metal Trunking, Cable Baskets, and Cables
  • Supplied in 1 metre lengths
  • Easily cut to size


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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