Armaflex Rail SD & SDC

Armaflex® Rail SD & SD-C foam is the world’s first flexible closed cell insulation to meet EN45545-2 fire protection requirements.

It is the leading and most innovative closed cell thermal insulation available to the railway industry worldwide and comes complete with a built-in vapour barrier reducing the risk of corrosion under insulation (CUI). Armaflex® Rail SD & SD-C has been developed to produce extremely low smoke density and reduce the risk of mold and mildew contributing to an improved indoor air quality.

Applications include insulation/protection for air-conditioning and refrigeration air ducts and pipes (including elbows, fittings, flanges etc.) to prevent condensation.

Armaflex® Rail foam comes in two grades; either standard SD or SD-C which is the standard SD material but with a silver metallic look coating.

Armaflex Rail SD & SDC thicknesses

3mm, 6mm, 9mm, 13mm, 19mm and 25mm as standard

Fire Classification  
EN45545-2 (R1) HL2
DIN 5510-2 S4-ST2-SR2- FED<1


Specification Typical Values
Polymer: Rail SD & SDC
Structure: Closed Cell
Colour: Blue
Temp: -50/+110 °C

**Data as per our current stock grade


  • BS6853 Cat 2 approved

  • EN45545-2 approved

  • Low compression set

  • High/low temperature resistance

  • UL94 V-0 and HF-1

  • IP65 & IP66 approved in application

  • FDA approved (grey only) 21 CFR 177.2600

Manufacture Capabilities:

  • Gaskets

  • Strip

  • Washers

  • Sheeting

  • 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