Sections

Latest News

News 4 Aug 2026

Die-Cut vs. Waterjet Cut Silicone Gaskets

What’s the best choice for your production run? Selecting the right material is critical for manufacturing high-performance seals, but how...

News 23 Jun 2026

Rolling Stock Networking: Connect with CB Frost at RSN 2026

At CB Frost & Co, we don’t believe in waiting around when a great opportunity knocks. That is exactly why...

Silicone Sponge Profiles

Uncategorised

April 7, 2019

    At CB Frost we are able to supply and manufacture an extensive range of extruded silicone cellular sponge profiles to suit all types of applications. Whether our clients need standard shaped profiles such as square, rectangle or circular, or completely bespoke extruded profiles, we can fulfil their needs....

 

 

At CB Frost we are able to supply and manufacture an extensive range of extruded silicone cellular sponge profiles to suit all types of applications. Whether our clients need standard shaped profiles such as square, rectangle or circular, or completely bespoke extruded profiles, we can fulfil their needs. Our profile sections can be supplied in complete coils, cut down to specific lengths, or even fabricated into rings of the required size, using our inhouse jointing equipment.

Closed cell silicone profiles can also be supplied in different grades to suit their intended application, including EN45545-2 rail compliant, UL94 V-0 grade, and general-purpose grades. To provide a durable solution to a wide range of uses, silicone sponge provides excellent resistance to ozone, UV and general weathering.

We can also supply sponge in densities ranging from 200kg/m³ to 530kg/m³.

Standard Silicone Sponge Profiles

Silicone Sponge Rectangle Sections

Rectangle extruded profiles can be supplied in thicknesses of between 3mm and 40mm and up to 100mm wide, dependent on the intended application.

Silicone Sponge Squared Sections

Square sponge profiles can be supplied from 3mm to 50mm squared to suit customer requirements.

Silicone Sponge Cord

We cut silicone sponge cord (circular sections) with diameters of 2mm to 50mm, dependent on the grade of sponge specified.

Silicone Sponge Extrusions to supply the Rail Industry

CBF SIL-V0 Sponge – EN45545-2

Last year, the new European standard for fire safety (EN45545-2) became mandatory in the rail industry. As a result of our connections and experience working with rail industry partners, we were able to stay ahead of the game, providing an extensive catalogue of EN45545-2 compliant materials.

With the introduction of EN45545-2 in mind, we launched our new lightweight silicone sponge, CBF SIL-V0. Specifically designed to improve fire and smoke safety for the rail industry, it is compliant with the new European fire safety standard EN45545-2 (R22/R23 – HL3) and can be extruded to form a number of simple shapes (square, rectangle and circular) as well as more technical profiles.

CBF SIL-V0 provides an ideal material for LCD display gaskets, anti-vibration strips and seals, HVAC, electrical enclosures, gap fillers and many other applications within the rail industry. Its closed cell structure means that in addition to being fire safe, it is resistant to water, moisture and dust.Silicone sponge extrusions

For more detailed information on extruded sponge profiles, or for assistance in choosing the right materials for a specific application, please call our sales team on +44 (0)121 773 8494.

Keep up to date with the
latest CB Frost & Co news

01
03
What You Need To Know About PORON® Urethane Foam
What You Need To Know About PORON® Urethane Foam

For over 30 years, CB Frost has maintained a close relationship with world leading speciality engineered materials company, Rogers Corporation. We are a preferred UK converter of Rogers products, including PORON® Urethane foam.  PORON® Urethane is an industrial polyurethane foam that is known for its compression set resistance. Its open cell or semi closed cell […]

CB Frost Invest in New High-Speed Cutting and Kiss-Cutting Machine
CB Frost Invest in New High-Speed Cutting and Kiss-Cutting Machine

As a company that believes in ‘quality without compromise’, we are always seeking to find new ways to improve our processes, whether this be through continued staff training and development, or investment in new technologies to increase efficiency and allow us to provide a wider range of bespoke products for our customers. To help increase […]

CB Frost & Co Ltd – Expansion and Relocation
CB Frost & Co Ltd – Expansion and Relocation

Our roots span over 95 years, with a heritage strongly intertwined with the beginnings and development of the commercial plastics industry itself. Established in 1921 in Birmingham, CB Frost & Co began work at the forefront of rapid development in plastics and mouldings. Fast forward nearly 100 years and it is time for the next […]

One Size Doesn’t Fit All – Our Bespoke Rubber and Plastic Products
One Size Doesn’t Fit All – Our Bespoke Rubber and Plastic Products

When it comes to the manufacturing industry and the components that are required, there’s not always a one size fits all approach. That’s why at CB Frost, we’ve heavily invested in our in-house manufacturing capabilities to provide a wide range of bespoke rubber products. We’ve put together a list of our top five products that […]

Sponge Rubber – Advantages and Applications
Sponge Rubber – Advantages and Applications

CB Frost Supporting NHS Frontline Workers
CB Frost Supporting NHS Frontline Workers

Following a successful move to our new premises at Matrix Point, Birmingham, CB Frost are currently working with skeleton staffing to supply essential industries during the coronavirus lockdown. Yesterday, we were contacted by a company manufacturing and supplying protective visors for the NHS. We were asked if we could supply some sponge material for the […]

Why CB Frost are Your First Point of Call for Rail Industry Insulation Materials
Why CB Frost are Your First Point of Call for Rail Industry Insulation Materials

Over a number of years, CB Frost have grown to be a market leader in the supply of cellular silicone insulation materials for the rail and modern engineering industries. Our impressive catalogue of specialist rail insulations is paired with our extensive knowledge and experience of gasketing, fabrication and other manufacturing processes. Here are just a […]

FDA Silicone Rubber for the Food and Drink Industry
FDA Silicone Rubber for the Food and Drink Industry

The key advantages of Food Grade Silicone Rubber FDA silicone rubber is non-toxic and odourless, ensuring food and drink is safe for consumption after contact with silicone applications. Silicone rubber is highly resistant to extreme temperatures, both low and high. It doesn’t degrade when in contact with heat or cold. It exhibits excellent resistance to […]

CB Frost and The New Tube For London
CB Frost and The New Tube For London

With London’s population growing rapidly, over the next few decades, trains, stations and tracks are being modernised across the London Underground Network to meet demands. The New Tube will first be introduced for the Piccadilly line, with the Bakerloo, Central and Waterloo, and City lines to follow. To provide a more reliable service and meet […]