Semi Closed Cell EPDM

A versatile foam solution for irregular sealing surfaces and light compression applications. Available in custom sizes and formats.

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What is Semi Closed Cell EPDM?

Semi closed cell EPDM foam is a flexible, weather-resistant material that offers a balance between compressibility and resilience.

With a slightly more open structure than fully closed cell variants, it adapts well to uneven surfaces and low-pressure sealing environments. It’s commonly used in automotive, HVAC, and construction applications for sealing, cushioning, and insulating tasks.

Technical Information

Semi Closed Cell EPDM Technical Details & Options

  • Typically ranges from 3mm to 30mm

  • Approx. 80–130 kg/m³

  • Supplied plain or with pressure-sensitive adhesive (PSA) backing

  • Custom tolerances available depending on format and application

  • RoHS and REACH compliant; UL94 HF-1 flame ratings available on selected grades

Benefits

Why Choose Semi closed cell EPDM?

Semi closed cell EPDM offers excellent environmental resistance with greater flexibility — perfect for dynamic applications. Here are the key benefits:

  • Flexible & Conformable

    Adapts to irregular surfaces with ease for a dependable sea when under compression.

  • Weather & UV Resistant

    Maintains performance in harsh outdoor conditions.

  • Lightweight & Durable

    Easy to handle without compromising on strength or lifespan.

  • Low Compression Set

    Returns to shape over time, ideal for repeated use and dynamic sealing.

  • Noise & Vibration Dampening

    Absorbs energy effectively in automotive and industrial uses.

  • Easy to Fabricate

    Suitable for die cutting, slitting, and adhesive lamination.

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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 Semi Closed Cell EPDM Used?

Semi closed cell EPDM is widely used across industries where flexibility, resilience, and reliable sealing are critical. Typical applications include:

FAQs

Frequently Asked Questions About Semi Closed Cell EPDM

Curious about how semi closed cell EPDM compares to other foams? We’ve compiled the most common questions to help you understand its unique strengths and how best to apply it.

  • 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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Need Expert Guidance on Semi Closed Cell EPDM

Our team can help you identify the right grade, thickness, and format to suit your sealing, insulation, or cushioning needs.

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