Neoprene Foam Washers

Neoprene Foam Washers

Neoprene Foam Washers

Neoprene Foam Washers are all manufactured by ASG, using high-quality material and state of the art machinery.  All our washers are made to order and are based on dimensions, samples or drawings to ensure the final product perfectly fits the application - even offering a small sample run if required.

Depending on the washer size and quantity, our production team will select from our range of atoms, autos, travelling head, kiss cut pressing machines or for very large or thick washers, we can programme our CNC (oscillating knife)  to produce the washers with a minimal lead time.  

As we split and laminate our products in house, we can offer neoprene sponge washers in thicknesses starting at just 1mm, very thick washers can also be produced by laminating layers of material together, all of which can be supplied with a plain or self-adhesive finish.

What is a Neoprene Sponge Washer?

Neoprene or Polychloroprene sponge is just one of many materials we use to convert into a number of products, including washers, sometimes also referred to as neoprene foam washers or neoprene washers.

A neoprene sponge washer is a flat ring cut from a sheet or block of material which is placed between two surfaces creating a level surface, acting as a spacer/seal or between a nut/bolt to spread the pressure when tightened. 

Neoprene sponge has a closed-cell structure but can still be compressed between two surfaces to create air, dust and watertight seal or placed with machinery, electrical appliances and vehicles to reduce unwanted excess noise and vibration.

Product Enquiry

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

    Product Specification & Key Characteristics

    • Colour: Black (FR available in grey)
    • Density: 150-200KG/M³
    • Tensile Strength: >500kpa
    • Temperature Range: -40ºc to +115ºc (intermittent up to 130°C)
    • Thickness: 1mm - 40mm (can be laminated for a greater thickness)
    • Fire resistance: UL94

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

    Why use Neoprene Sponge Washers?

    Neoprene sponge washers possess a number of desirable properties making them a popular choice across many industries.

    Its closed-cell structure creates an air, dust and water tight seal, with great longevity compared to other materials thanks to its excellent ageing properties, being resilient to ozone, sunlight, oxidation and UV exposure. 

    Neoprene sponge gaskets are resistant to oil, chemically inert, flame retardant and have a wide working temperature range of -40°C to +115°C, therefore found used within many outdoor, building & construction, glazing, electronic and automotive applications.


    Washers can be used as a gap filler, dust/air/water 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 presses and CNC machinery.

    Benefits of Neoprene Sponge Washer

    • Oil & chemical resistant
    • Durable
    • UV, Ozone & weathering resistant
    • Flame retardant
    • Sound/vibration absorbing
    • Closed-cell which prevents bacteria & mould growth

    The Advantages of Using Neoprene Sponge Washer

    Neoprene sponge washers have many advantages, the material itself is long-lasting within indoor or outdoor applications and does not go brittle over time even at extremely high or low temperatures thanks to its wide operating temperature range.

    Neoprene sponge is one of ASG’s primary stock materials and therefore readily available in block form meaning washers can be turned around and delivered quickly. Neoprene sponge is easy to cut using a range of methods and will hold any of our self-adhesives and foils well.

    Under minimal compression, neoprene sponge washers provide excellent dust,  air and watertight seal as well as good resistance against oil. Being a flexible and robust material, neoprene washers are suitable for use within many marines, automotive, glazing, electronic, lighting, ventilation, building and construction applications.

    Different Grades

    Advanced Seals & Gaskets network with a number of material manufacturers and suppliers, meaning our customers benefit from the availability and a choice of grades when designing their washers.  Neoprene sponge washers can be produced in our medium density, firm, flame retardant and EPDM/Neoprene blended grades.

    Firm Grade Neoprene sponge washers are closed-cell, fire resistance tested to FMVSS 302, and have a density of 180kg (+/- 25), meaning they can be used in more heavy-duty applications, where less compression is needed to create a tight seal.  

    Flame Retardant Neoprene washers are grey in colour, can handle continuous temperatures from -40°C to 115°C and subject to more vigorous fire testing ( FMVSS 302, UL94, AFNOR P9750), this makes the material ideal for use within construction and transport applications where a flame-resistant barrier may be required.  

    EPDM/Neoprene Blend sponge is an extremely versatile material, combining the properties of both types of sponge, excellent weathering and outdoor resistance of EPDM and the oil/chemical resistance of neoprene, making it the ideal choice for many outdoor sealing applications.    

    Please get in touch if you are unsure which grade of neoprene sponge you require for your washers or would like samples for your own tests.

    Have a Question about Neoprene Sponge Washer?

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