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Flexifin Pyrostrip 500 Twin Blade Illustration

Pyrostrip 500PSS 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 both single and twin blade designs, 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 100P or 500P intumescent material.

  • Choice of Pyrostrip intumescent materials
  • Choice of standard colours – white, light and dark brown, light and slate grey, black, cream and red
  • Choice of standard lengths – 1000mm, 1050mm, 2050mm, 2100mm
  • Non-standard colours and lengths available on request
  • Twin Fin available in blade height of 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

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

Standard Lengths:

1000mm , 1050mm, 2050mm, 2100mm.

Non Standard Lengths:

Non standard lengths can be produced. Please contact our Sales Office.

Standard Colours :

White, Light Brown, Dark Brown, Light Grey, Slate Grey, Black, Cream, Red.

Non Standard Colours:

A wide range of non standard colours can be produced. Please contact our Sales Office.

Fin Seal:

Twin Fin available in 5mm blade height.

Choice of Intumescent core:

100 Palusol based white core or 500 Graphite dark grey.


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