Semi Open Cell EPDM

semi open cell EPDM sponge

Advanced Seals & Gaskets Ltd supply a range of EPDM sponge materials, in various densities, grades and in various different products cut from the material. One of the EPDM sponge grades we can offer is semi open cell EPDM sponge, sometimes also called semi-closed cell sponge or semi-open cell foam. 

Semi open cell EPDM sponge is manufactured in block form, which we can split down into sheets or join together. Then split to produce continuous lengths or rolls of materials in thicknesses starting at just 1.5mm.

On-site conversion facilities mean we can stock and supply rolls and sheets ready for despatch. We use them to further convert into multiple usable finished parts including pads, washers, gaskets or strips. All supplied plain or laminated with a choice of one of our many self-adhesives or foils.

What is Semi Open Cell EPDM Sponge?

Semi open cell EPDM sponge is an extremely soft and flexible grade of EPDM sponge rubber. Still manufactured from the chemical components Ethylene Propylene Diene Monomer. But using a different manufacturing process to create the mixture of open and closed cells throughout the material. 

The cell structure of Semi-Open Cell EPDM is created in the manufacturing process by physically "bursting". The closed-cell structure in order to create a product that is softer and therefore easier to compress than the more traditional medium or firm grade semi open cell EPDM sponge.

Material Enquiry

For information on Semi Open Cell EPDM please complete the following quick enquiry or call us on +44(0)1384 252555.

    Specification & Key Characteristics

    • Colour: Black
    • Cell Structure: a combination of open and closed cells
    • Temperature Range: -40 ˚C and 100˚C
    • Density: 70 - 130 kg/m3
    • Fire-resistant: (FMVSS302 - FIAT 50433)
    • Resistances: Ozone, UV, high and low temperatures, electricity

    Full technical data can be supplied upon request,
    or downloaded from our online portal.

    Why use Semi Open Cell EPDM Sponge?

    A semi open cell EPDM sponge offers similar flexibility and compressibility to an open-cell foam, but under compression, they have excellent sealing capabilities more like a closed cell sponge.

    Semi-open cell sponges are durable and offer the excellent ozone and weathering resistance of a standard EPDM, but with a slower and better recovery following compression which is suited to sealing applications. 

    Semi open cell EPDM sponge can be taken as complete sheet or roll form, or as pre-cut parts, all suitable for use as a solution to indoor and outdoor sealing applications, providing protection against air, dust and moisture.

    The Advantages of Using Semi Open Cell EPDM Sponge Rubber

    The super-soft nature of semi open Cell EPDM provides excellent sealing capabilities once compressed.

    Due to low compression load, the foam can compensate for dimensional deviations in substrates and can. Therefore, be applied to both rough, smooth and low energy surfaces. 

    The material offers resistance to Ozone and UV, has a wide working temperature range of  -40 ˚C and 100˚C and can be used for sealing against water, dust and air.

    Being such as soft and conformable material, semi open cell EPDM sponge can be converted into a range of products. To be used as vibration and acoustic solutions, within HVAC systems, within the automotive industry and as window seals, to name a few.

    Benefits of Using Semi Open Cell EPDM Sponge

    • Semi open cell EPDM sponge is resistance to ozone and UV light
    • Soft and compressible 
    • Combination of open and closed cells
    • Excellent acoustic performance
    • Good compression set
    • Seals against air, dust & moisture
    • Semi open cell EPDM sponge is converted onsite into a range of thicknesses and products

    Grades of EPDM Sponge Available

    ASG stock a variety of other grades and densities of EPDM sponge which can call be used to manufacture gaskets each suited to individual applications. These include firm grade, high temperature and semi-open cell varieties:

    Medium Density EPDM is available in black or white colour options.  EPDM sponge is a strong, synthetic material that has a closed-cell structure making it an ideal material for internal and external sealing applications where minimal compression is required for the material to work as an effective seal.  Medium-density EPDM sponge has a density of 90 – 140kg/m3, an operating temperature range of -20°c to +85°c and is flammability tested to  FMVSS 302.

    High-Temperature EPDM Foam is closed cell and highly flexible even at low temperatures, with an amazing temperature range of -50°c to +128°c.  High-Temperature EPDM foam has many excellent mechanical characteristics including thermal and insulation properties, making this material ideal for many industries and applications including HVAC, Refrigeration, Pipeline, Automotive, White goods and Building & construction, etc.

    Firm Grade EPDM Foam is a more resilient material that will not compress as much as the standard grades under load, also this material benefits from increased tear strength and suits some of the more demanding applications such as Automotive, White Goods, Marine, Defence, Building and Construction, etc

    For further information, you can view our online specification sheets or speak to a member of our sales team.

    Have a Question about Semi Open Cell EPDM?

    Please contact us using the form below or by calling us on +44(0)1384 252555.