EPDM Sponge Seals

Advanced Seals & Gaskets Ltd produce some of the highest quality seals in the UK, with EPDM sponge seals taking the form of gaskets, washers, O-rings, cord and extrusions, which are all designed for the purpose of preventing leaks or the ingress of air, fluids and gas. 

All our EPDM sponge seals are made to order and are produced by following samples or drawings provided by customers to ensure the final product perfectly fits the application. 

As each form of EPDM sponge seal needs to be manufactured using a different process, ASG has invested heavily in various machinery allowing us to offer seals in both high and low volumes.

What are EPDM Sponge Seals?

EPDM is an abbreviation of Ethylene Propylene Diene Monomer which are the chemical components used to manufacture this sponge.  EPDM sponge is a strong, synthetic material that is closed cell making it an ideal material for internal and external sealing applications where minimal compression is required for the material to work effectively.  

EPDM sponge seals are a device or substrate that is used to join surfaces together, acting as a separator or a barrier to prevent liquids, particles or gases from escaping or penetrating the application. ‘Seal’ is a generic term for products often taking the form of cut gaskets, strips, washers, extruded or moulded profiles, edge trims and cord. 

Most of the EPDM sponge seals produced by Advanced Seals and Gaskets can be supplied with a choice of self-adhesives which assists with placement of the seal and holding it in position.

Epdm Sponge Seals

Product Enquiry

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






    Product Specification & Key Characteristics

    • Colour: Black and white options (medium-density only)
    • Density: 90 – 140kg/m3
    • Flammability Tested: FMVSS 302  
    • Operating Temperature: -20°c to +85°c
    • Thickness: 1mm - 50mm (without laminations)
    • Environmental Resistances: Ozone, UV, weathering
    • Chemical Resistances: ketones, diluted acids and alkalis

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

    Help and guidance

    If you would like to speak to a representative to discuss your specific application or requirements please call our sales office direct on 01384 469100, alternatively you can send an E-mail. Simply click on the link and forward us your details along with your question and we will contact you immediately.

    Samples - Technical EPDM Sponge Seals

    Samples can be submitted for testing upon request.

    Call now for sample requests or further help.

    Why use EPDM Sponge Seals?

    EPDM sponge seals are designed to prevent the escape or ingress of dust, air, liquids or gases when compressed between irregular surfaces - very much used in the same way as a gasket. Seals can also be used as an aid for shock, noise and vibration dampening in a range of industries. 

    Our EPDM sponge seals can commonly be found used in valves, pumps, engines, machinery, electrical appliances - in fact, seals are used in applications where there is a risk of leakage, where harmful or toxic liquids & gases are present, where components need to be kept separate or for protection on moving parts.  In order for a seal to work effectively, it needs to compress and fill the entire space to create pressure and airtight protection. 

    As EPDM sponge is a closed-cell material, even when not compressed, its nitrogen gas-filled cells prevent the passage of air, liquids and gasses, the releasing of nitrogen gas gives the material its strong compression set and recovery characteristics.

    EPDM sponge seals are a popular product in a variety of applications for a number of reasons and can be found used within the construction industry, in automotive interiors, electronic, lighting systems ventilation glazing seals and door seals.

    The Advantages of Using EPDM Sponge Seals

    EPDM sponge seals are produced using a strong, synthetic material which is closed cell making it an ideal material for internal and external sealing applications where minimal compression is required for the material to work effectively, it has an excellent lifespan even when used outdoors and is free from dust and fibre.  

    EPDM sponge seals can be manufactured in a huge range of sizes and thicknesses, with a choice of foils and self-adhesives applied to one or both faces.  For very thick seals or a combination of properties that are required, the EPDM sponge can be laminated in layers or to other materials for use within more specialist applications.  

    EPDM sponge is a popular choice of material that is air and watertight, ages well without becoming brittle offers good UV resistance and is able to withstand a wide scale of temperatures ranging from -20°C up to a high of 85°C. 

    It’s excellent electrical insulation material, as well as having good resistance to ketones, ordinary diluted acids and alkalis, Ozone, UV and weathering as well as its general resistance to abrasion. EPDM foam is also flammability tested to meet FMVSS302 and UL94 HBF standards.

    The Benefits of Using EPDM Sponge Seals

    • Noise, vibration, shock and abrasion reduction 
    • Flexible with good compression recovery
    • Cost-effective and readily available
    • Naturally compressible to create the perfect seal to control air and water leaks
    • Closed-cell structure   prevents bacteria and moulds build-up
    • Excellent properties making it popular for use in a range of industries and applications
    • Easy to convert into a range of products including gaskets, and will hold most adhesives well

    Grades of EPDM Sponge Seals 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:

    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.

    Semi-Open cell EPDM combines the flexibility of an open cell material with the excellent sealing capabilities of closed-cell types once compressed. Semi-open cell EPDM pads will allow for the ingress of air, dust, moisture until compressed by 80% of their thickness, following this the product becomes water and airtight and behaves as a closed-cell product.

    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 spec sheets or speak to a member of our sales team.

    Have a Question about EPDM Sponge Seals?

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