TENMAT FIREFLY 102B is a rigid intumescent material that possesses good pressure generation and mid-range free expansion performance. TENMAT FIREFLY 102B produces a very solid and durable char structure.

TENMAT FIREFLY 102B is most commonly used as the intumescent core within air transfer grilles to maintain fire compartmentation in timber fire doors. The material would also be suited to applications including as a fire seal for door and glazing applications, ironmongery protection, construction joints, gaskets and general gap sealing.


TENMAT FIREFLY 102B is available with or without self adhesive backing or PVC coating. It can be supplied in sheets with maximum dimensions of 2150 x 1050 mm, or alternatively it can be slit to a variety of widths and lengths within those dimensions or slotted to build up into an air grille matrix.

  • 17:1 expansion ratio
  • Rigid Material
  • Stable and resilient insulating char


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