ArmaFlex® Class 1

Built-in water vapour barrier to reduce risk of corrosion under insulation (CUI). Conserves energy and reduces heat loss. Class 1 fire classification according to BS476 Part 7. Certified by leading international fire safety agencies. Fibre-free.

Key features

  • Closed-cell structure - Minimises moisture permeation to ensure long-term protection agains corrosion under insulation. Removes the need for an additional water vapour barrier. 
  • Good fire performance - FM Approved for entire range of insulation thickness. Certified to conform to safety, reliability and performance standards of various local fire safety bodies. 
  • Energy efficient - Low thermal conductivity minimises energy losses to give long term energy savings
  • Environmentally safe - Zero Ozone Depletion Potential and Global Warming Potential; rated "Excellent" by Singapore Green Building Council.
  • Safer indoor air quality - Free for fibre and formaldehyde, and GREENGUARD® Gold certified for low emissions fo volatile organic compounds. 
  • Easy-to-install: Highly flexible elastomeric foam that can be installed quickly on irregular shapes and installations in tight spaces.
ArmaFlex® Class 1 is a flexible thermal insulation material with a built-in water vapour barrier to reduce risk of corrosion under insulation.
ArmaFlex® Class 1 is a flexible thermal insulation material with a built-in water vapour barrier to reduce risk of corrosion under insulation.

Curious about the safety standards of our insulation materials? Read more in our Armacell Know-how guides.

Armacell Know-how // BS 476 Part 7

BS 476 refers to the British standard for fire tests on building materials and structures. Part 7 specifies the test method for measuring the lateral spread of flame along the surface of a test specimen. During the test, the measurements recorded include... Read more

Armacell Know-how // BS476 Part 6

BS 476 refers to the British standard for fire tests on building materials and structures. Part 6 specifies a method of test for providing a comparative measure of a flat material/assembly's contribution to the growth of a fire. It takes into account the combined effect of factors such as... Read more

Armacell Know-how // FM 4924

The FM approval is an approval requirement for insulation material used on the exterior of non-combustible pipes or ducts. This standard uses a full-scale test for pipe and sheet insulation. Tests in this standard are different from the BS 476 standard as... Read more

Armacell Know-how // NFPA 274

The NFPA 274 Standard Test Method is a full-scale test that uses large samples to simulate how insulated pipes in a confined vertical configuration may behave during a growing fire situation. It may be a more realistic assessment as it reflects the actual... Read more

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