Armaflex Class O Insulation Foam

Class O is a lightweight, closed cell flexible insulation foam for reliable and continuous condensation control.

It has a unique micro-cell structure (Armacell grade) that makes the foam easy to install with no additional vapour barrier requirements. This material is tested to BS476 part 7 and achieves results better than class 1.

A combination of low thermal conductivity and high resistance to water vapour prevents long term energy loss, moisture ingress and reduces the risk of corrosion under insulation.

The built in Microban protection and excellent fire performance make Class O suitable for use in public buildings and process industries.

The Armacell grade of Class O is dust, fibre, and formaldehyde free.

Typical applications include pipework, air conditioning ductwork, hot and cold-water services, and insulation/protection against condensation.

Armaflex Class O Insulation Foam thicknesses

3mm, 6mm, 10mm, 13mm, 19mm, 25mm, 32mm and 50mm as standard

Specification Typical Values
Polymer: PVC/Nitrile
Structure: Closed Cell
Colour: Black
Temp: -50/+100 °C

**Data as per our current stock grade


  • Stable thermal conductivity for long term energy efficiency

  • BS476 approved – Part 6 & 7

  • Built in Microban, antimicrobial protection

  • Excellent resistance to the effects of Ozone, oil, and chemicals

Manufacture Capabilities:

  • Gaskets

  • Strip

  • Washers

  • Sheeting

  • Tubing

  • Fabrication

Our Partners

Dependable on-time
Full lot traceability on
raw material
Rapid lead times on tooling
and products
Manufacturing services from 1-off
to mass production
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Office Hours

Monday to Thursday
8.00am to 4.35pm
Friday - 8.00am to 1.00pm

Get in touch

Unit C1, Matrix Point, Mainstream Way, Nechells, Birmingham: UK: B7 4SN