Armaflex Rail SD & SD-C Gaskets

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

All Armaflex rail products conform to the European fire protection standard EN45545-2 and are the first to achieve Levels HL2 and 3 R1.

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


Tooling continues to be very important in the manufacture of die cut gaskets. Thanks to the company's long-standing history, we work with a variety of well-established tool makers in the West Midlands region.

Adhesive Backed Armaflex Rail SD & SD-C Gaskets

CB Frost can apply a pressure sensitive adhesive to either one or both faces of Armaflex Rail SD & SD-C 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 or Adhesive Backed Armaflex Rail SD & SD-C gaskets is 2-3 weeks, however CB Frost are flexible and work with our customers to ensure we meet their expectations.


CB Frost produce large amounts of Armaflex Rail SD & SD-C foam gaskets every year and cater for small, medium, and large runs. Our manufacturing range includes Die Cut, Water Jet cut, Kiss cut, and High-Speed cutting processes providing our customers with a vast array of options dependent on the applications requirements.

Armaflex Rail SD & SD-C foam gaskets are manufactured at our site in Nechells, Birmingham based in the West Midlands.

We have the capabilities to convert Armaflex Rail SD & SD-C Gaskets into various shapes/strips/tapes etc, please click on the below for further details or visit our products section within the website.


Armaflex Rail SD & SD-C Strip

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Armaflex Rail SD & SD-C Sheeting

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Armaflex Rail SD & SD-C Washers

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Armaflex Rail SD & SD-C Gaskets 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