Pyrosist Intumescent Strip

Why Pyrosist Flexible Intumescent Strip Seals

Pyrosist Flexible Intumescent Strip Seals provide a permanent seal for fire rated timber, composite and metal door sets. Pyrosist has been specially developed to react at lower temperatures that protect the doorset at the critical time. Our seals can be rebate or surface mounted. Pyrorist Flexible Seals are ideal for factory fitting or on site installation and can be supplied in any colour required, subject to volume both in strip and coil form, to minimise wastage. Pyrosist Seals are supplied with a fully tested acrylic self-adhesive tape for a secure and lasting installation. Pyrosist Flexible Seals are tested to BS 476: Part 22: 1987 and EN1634-1.

Field Of Application

Pyrosist Flexible Seals have been specifically designed for use in the following applications: New build and retro-fit applications Groove or surface mounted Single and double action fire doorsets Composite doorsets Steel doors and frame.

Available Sizes

The range of sizes available and tested is growing rapidly. The list below shows current sizes tooled, but please not that any sizes and colour can be produced subject to required volumes.

Fire Only

10×2
15×2.5
10×3
30×1
38×1
34×4
35×1
30×1
30×2
10×1.5
54×1.2

Fire only
(coloured skin)

10×4
20×1.5
15×4
20×4
40×1.5
25×3
25×4

Fire & Smoke (coloured skin)

10×4
15×4
19×4

Technical Data

  • Chemical composition: The active element is high-pressure forming, multidirectional expandable graphite in flexible
  • PVC Adhesive tape: High performance modified acrylic with either wax paper or filmic liner
  • Tensile strength: >32N/15mm
  • Elongation: 40%
  • Humidity resistance: GOOD
  • Solvent resistance: GOOD
  • Ageing resistance: GOOD
Pyrosist Intumescent Strip