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Flexifin Twin blade, intumescent smoke and acoustic seal. Co extruded blades off centre

Pyrostrip 100PSS Flexifin

Intumescent fire, smoke and acoustic seal

Our standard Flexifin seals provide an integrated solution to problems of fire spread, cold smoke leakage and acoustic insulation. Available in a twin blade design, Flexifin not only offers highly effective sealing but also allows doors to return to their closed position with minimum resistance.

The fin blade is made from high-performance thermoplastic, incorporated into a rigid pvc holder containing either our 100 or 500 intumescent material.

  • Choice of Pyrostrip intumescent materials
  • Choice of standard colours – white, brown, dark brown, slate grey, or black. Non standard colours available on request
  • Standard length – 2100mm
  • Non-standard lengths up to 3m available on request
  • Twin Fin available in 5mm
  • Proven fire resistance from 30 – 60 minutes
Mann McGowan standard colours


Pyrostrip Flexifin Standard with twin fin insert can be supplied in the following sizes, colours and finishes.

Standard Sizes:

Widths: 10mm, 15mm, 20mm, 25mm, 30mm, 38mm, 48mm

Depths: 4mm, 5mm, 6mm, 7mm, 14mm

Non-standard sizes can be manufactured to order, please contact our Sales Office.

Standard Lengths:

Standard length – 2100mm.

Non Standard Lengths:

Non standard lengths of up to 3m can be manufactured on request. Please contact our Sales Office.

Standard Colours :

White, Brown, Dark Brown, Slate Grey or Black

Non Standard Colours:

A wide range of non standard colours available on request. Please contact our Sales Office.

Fin Seal:

Twin Fin available in 5mm.

Choice of Intumescent core:

100P Palusol based white core or 500P Graphite dark grey.


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