TENMAT FIREFLY 104E is a dark grey intumescent paper which generates high expansion and expansion pressure when exposed to fire or heat.It is suitable for applications such as door and glazing seals, door hardware and ironmongery protection, damper seals, gap sealing or a variety of gasketing applications.

FIREFLY 104E is highly flexible allowing it to be wrapped or folded to suit various applications but produces an excellent char structure helping to maintain integrity throughout the fire.


Tenmat FIREFLY 104E is supplied with or without self adhesive backing. It can be supplied in full rolls or alternatively slit to a variety of widths and roll lengths (see table for available dimensions). The material is also suitable for gasket cutting.

  • 20:1 expansion ratio
  • Highly flexible
  • Available in thicknesses as low as 0.5mm
  • Supplied in rolls


Self Adhesive Thickness (mm) Width (mm) Length (m)
No 0.5 560 100
Yes 0.8 560 100
No 1 1120  100
Yes 1.3 1120 100
No 1.8 1120 50
Yes 2.1 1120 50

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