EPDM Foam Washers

EPDM Foam Washers

EPDM Foam Washers

One of Advanced Seals & Gaskets most popular stock material is EPDM, which we use to convert into a multitude of products, one of which is EPDM foam washers, also referred to as EPDM sponge washers. 

Using samples, drawings, or dimensions given by customers, we can use one of the specialized presses or CNC/oscillating knife (for large or very thick items) to produce washers in almost any size and quantity, with a plain or self-adhesive finish and as loose cut part or kiss cut on sheets/rolls for a more time efficient application for the end user.

EPDM foam blocks are approximately 50mm thick, meaning we can produce washers from this, down to just 1mm, or greater than 50mm with laminations.  Manufacturing washers in-house allows us to oversee the entire process to ensure that our standards are kept high and lead times low. 

What Are EPDM Foam Washers?

Washers can be described as a flat ring of material such as metal, rubber, which is placed between two surfaces to create a level surface, as a spacer, seal, or between a nut/bolt to spread the pressure when tightened.  EPDM foam washers are manufactured using EPDM foam material, EPDM is an abbreviation of Ethylene, Propylene, Diene, and Monomer. EPDM foam washers can be used as seals for air/water flow applications and within machinery, vehicles, electrical goods to solve unwanted noise insulation and vibration issues. 

Product Enquiry

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

    Product Specification & Key Characteristics

    • Colour: Black
    • Density: 90 - 140
    • Tensile Strength: >300kpa
    • Flammability Tested: FMVSS 302  
    • Operating Temperature: -20°c to +85°c
    • Thickness: 1mm - 50mm (without laminations)

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


    Washers can be used as a gap filler, dust seal, cushion, or spacer.  We manufacture washers using an extensive range of other materials including neoprene, silicone, solid rubber, sponge, plastics, polyethylene, PVC, Polyester, cork, textiles, and many more, using specialist machinery including presses and kiss cut machines.

    Why use EPDM Foam Washers?

    EPDM Foam washers are manufactured using a closed cell material, meaning that even when not compressed, its nitrogen gas filled cells prevent the passage of air, liquids, and gasses. It is the releasing of Nitrogen gas that gives EPDM foam its strong compression set and recovery. EPDM foam washers are a popular product for a number of reasons, it has excellent resistance to 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.  Applications in which these washers can be found include automotive interiors, electronics, lighting, and ventilation systems.

    Different Grades

    ASG can supply washers in a range of EPDM foam grades, these include Firm density, medium density, semi-open cell and high-temperature.

    High Temperature EPDM foam - is closed cell, highly flexible even at low temperatures with an amazing temperature range of -50°c to +128°c.  It has 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 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 - designed for customers requiring a more resilient material that will not compress as much as the standard grades under load.  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 

    EPDM foam washers are primarily black in colour, with the exception of medium density EPDM which can be supplied in white colour.

    Benefits of EPDM Foam Washers

    • Noise/vibration reduction
    • Abrasion-resistant
    • Cushioning
    • Seals against water/air and dust
    • Resistant To Chemicals, UV & Ozone resistance
    • Thermal insulation

    Advantages of Using EPDM Foam Washers

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

    EPDM foam washers can be manufactured in a huge range of sizes and thicknesses, with a choice of coverings and self adhesives applied to one or both faces.  For thicker washers or additional properties, EPDM foam washers can be laminated to other materials for use within more specialist applications.

    Have a Question about EPDM Foam Washers?

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