RGH Converting | Closed Cell EPDM

Closed Cell EPDM

Closed-cell EPDM foam, custom-cut to size for demanding sealing, gasketing and insulation applications. Delivered fast, UK-wide.

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What is Closed-Cell EPDM Foam?

EPDM (Ethylene Propylene Diene Monomer) foam is a closed-cell synthetic rubber renowned for its durability, flexibility and resistance to weathering.

Its structure makes it ideal for sealing, gasketing and insulation – especially in environments exposed to moisture, UV or ozone. Whether you’re manufacturing automotive components or external enclosures, EPDM delivers long-lasting performance and reliable protection.

Technical Information

Closed-Cell EPDM Technical Details & Options

  • Typically available from 1mm to 25mm. Custom thicknesses on request.

  • Ranges from 60kg/m³ to 120kg/m³ depending on application requirements.

  • Available with single- or double-sided pressure-sensitive adhesive (PSA) options.

  • Cut to industry-standard tolerances for dimensional accuracy and repeatability.

  • Available in grades compliant with UL94, FMVSS 302, and REACH/RoHS where required.

RGH Converting | Closed Cell EPDM

Benefits

Why Choose Closed-Cell EPDM?

EPDM foam delivers a strong performance in even the harshest of environments. Here are six reasons why engineers and manufacturers choose it for demanding applications:

  • Weather Resistant

    Performs in extreme outdoor environments without degrading or cracking.

  • UV & Ozone Stable

    Maintains flexibility and performance under prolonged UV exposure.

  • Water-Resistant Seal

    Closed-cell structure offers excellent moisture and splash resistance.

  • Wide Temperature Range

    Reliable in hot or cold conditions (typically -40°C to +100°C).

  • Compressible & Flexible

    Conforms to uneven surfaces and tolerances for secure gasketing.

  • Low Maintenance & Long Lifespan

    Resistant to aging, ensuring product durability over time.

RGH Converting | Closed Cell EPDM

Request a Sample

Request a product sample to test performance in real-world conditions.

Our samples are a great way to evaluate suitability before scaling production and we’re here to support you every step of the way.

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Common Industry Uses

Where is Closed-Cell EPDM Used?

Closed-cell EPDM is trusted across industries where long-term durability, reliable sealing, and resistance to environmental factors are essential. Common applications include:

FAQs

Frequently Asked Questions About Closed-Cell EPDM Foam

Got questions about Closed-Cell EPDM foam? We’ve answered the most common queries about its performance, applications, and customisation options to help you choose the right solution for your project.

  • What are the main benefits of EPDM foam?

    EPDM foam offers excellent resistance to weathering, UV, ozone, and temperature extremes, making it ideal for outdoor sealing applications.

  • Is EPDM foam suitable for automotive or HVAC sealing?

    Yes. RGH commonly supply EPDM into automotive door seals, HVAC units, and enclosure gasketing due to its long-term durability and compression-set resistance.

  • How well does EPDM foam resist oils and fuels?

    EPDM provides poor resistance to oils, fuels, and hydrocarbons. For oil exposure, neoprene or NBR-based foams are typically recommended.

  • Does EPDM foam accept PSA adhesives?

    Yes. EPDM bonds very well with high-performance acrylic adhesives and RGH commonly supply with adhesive backing for easy installation.

  • What densities and thicknesses are available?

    EPDM foams come in a several densities and can be supplied in thicknesses from thin gasketing layers to thick sealing strips. Custom die-cutting and lamination are standard for RGH.

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RGH Converting | Closed Cell EPDM

Need Expert Guidance on Closed-Cell EPDM?

From early-stage development to full production, our team can help you select the right grade, format, and finish for your application.

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