Armaflex Class O Insulation Foam Strip

CB Frost are an established UK manufacturer of sponge, foam and rubber strip.

The materials we covert from sheeting to strip are either closed cell, open cell, semi-closed cell sponge, foam or solid rubbers.

Class O is a lightweight, closed cell flexible insulation foam with built in Microban.  It absorbs sound effectively offering excellent NVH and acoustic solutions. Class O conforms to BS476 part 6 & 7 and is suitable for use in public building and process industries.

Adhesive backed Armaflex Class O Insulation Foam Strip

CB Frost can apply a pressure sensitive adhesive to either one or both faces of Class O foam. We stock a wide range of synthetic and acrylic tapes, our adhesive tapes come with an easy peel release liner which you simply remove to expose the adhesive. This face is then placed on to the substrate and firmly pressed to obtain the bond.


Our lead-time to supply plain class O foam strip is 5-7 working days. Adhesive backed class O foam strip is 7-10 days, however CB Frost are flexible and work with our customers to ensure we meet their expectations.

Class O PVC/Nitrile foam strip Capabilities

We produce large quantities of class O foam strip every year and cater for small, medium and large runs. Our slitting capabilities allow us to offer our customers a range of widths and can manufacture strip from 5mm wide.

We supply Class O foam in coils. The length of each coil is based on a standard roll length, which is usually 10mtrs. We also have the facility to supply shorter lengths if required.

Coils are packed securely into suitable packaging and labelled in accordance with our customer requirements.

Class O foam strip is manufactured at our site in Nechells, Birmingham based in the West Midlands.

Material colour is black and we hold in stock following thicknesses.

Class O sponge thicknesses

3mm, 6mm,10mm, 13mm, 19mm, 25mm

Free of charge Class O PVC/Nitrile foam strip samples

CB Frost will supply free of charge a small sample of Class O foam strip to your required size for testing before committing to an order.


  • Plain or adhesive backed strip

  • Double sided adhesive backed strip

  • Cut to length

  • 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

We have the capabilities to convert Armaflex Class O Insulation Foam Strip into various shapes/strips/tapes etc, please click on the below for further details or visit our products section within the website.


Class O PVC/Nitrile foam gaskets

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Class O PVC/Nitrile foam washers

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Class O PVC/Nitrile foam sheeting

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Armaflex Class O Insulation Foam Strip SAMPLE REQUEST

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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