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. FF104E intumescent material is a thin intumescent material that is available in roll format or alternatively in sheets or cut into pre-shaped gaskets. It is an ideal material for use as an intumescent fire door seal whether around the perimeter edge of the fire door or as intumescent ironmongery protection, for example behind hinges and locks.

The material is available in thicknesses of 0.5mm, 1.0mm and 1.8mm and with or without a self adhesive layer so can be very easily installed in small and tight gaps and voids where the use of intumescent sealant or similar is much less suited and messy.


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

For more information, to order or to speak to a member of our product team

  • Drop files here or
    Max. file size: 64 MB.
    • This field is for validation purposes and should be left unchanged.
    Contact Us

    Complete the form below to speak with a customer services representative or request a call back.

    Not readable? Change text. captcha txt

    Start typing and press Enter to search