Butyl Washers

Here at Advanced Seals & Gaskets, we produce a variety of washers, including butyl washers.  Solid butyl rubber is manufactured and stocked as rolls in a range of thicknesses, from which washers and other products can be cut. 

Our washers are produced on-site using drawings, samples or measurements provided by our customers, with whom we work closely to ensure the final product is to their exact specification.  Depending upon the size and quantity of washers required, one of many presses, kiss-cut machines or CNC machines can be used to manufacture the final product, from one-off samples to multiple batches runs.

Washers are a popular product as many industries require them for sealing against dust, air and moisture, gap-filling between uneven surfaces or for reducing unwanted noise and vibration. Our Hypalon rubber washers can be supplied plain or with a choice of finishes including foils, self-adhesives or laminated to other materials, depending on the size and quantity of the gasket, they can be supplied as loosely packed parts or kiss-cut on rolls.

What are Butyl Washers?

Solid Butyl rubber is a synthetic rubber made up of blending isobutylene with isoprene, this creates a property known as Polyisobutylene, commonly known as PIB.  This material offers many desirable properties including excellent thermal stability and resistance to UV and weathering, it also has an impermeable structure required for air retention or gas sealing applications. 

When cut into a ring with an outer diameter (OD) and inner diameter (ID) measurement, they form a washer.  Hypalon washers can be placed between two surfaces creating a level surface, acting as a spacer/ seal or between a nut/bolt to spread the pressure when tightened.

Butyl Washers

Product Enquiry

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

    Product Specification & Key Characteristics

    • Colour: Black
    • Shore Hardness: 60°
    • Temperature Range: -40°C - +140°C
    • Thickness available: 1mm - 20mm
    • Resistances: Flex cracking, AbrasionTear, impact resistance, weather resistance, UV, oxidation, water/steam
    • Applications: sealing against moisture, gas and air, anti-vibration 
    • Finish: cloth, cloth/cloth or plate

    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 Butyl Washers

    Samples can be submitted for testing upon request.

    Call now for sample requests or further help.


    ASG produce washers in our newly renovated facilities using state of the art machinery including a choice of presses and oscillating knife.  As we produce the washers in-house we are able to work alongside our customers to provide the best quality gaskets to their specifications to ensure that the washers are produced for the desired applications.

    We produce washers in most materials such as EPDM, neoprene, nitrile, polyethylene, Plastazote, Evazote, rubber, silicone sponge, plastic, foam and many more.  For more information on the many materials, we offer please get in touch with our team.

    Why use Butyl Washers?

    Butyl rubber washers are often found used in many applications where there is exposure to water and gases.  Butyl rubber is a highly durable and stable material with exceptional resistance to UV,  weathering and ozone which make it excellent for both internal and external use. 

    The material is flexible, has a good resistance to flex cracking, abrasion, impact and tear, combined with a low gas and vapour permeability, butyl rubber which makes butyl washers perfect for use in gas and air sealing applications. However, they aren't suitable to use with oils and petrol.

    Washers are often used as a type of seal, where they can create air/liquid tight seals in pipework, but surprisingly serve a number of purposes which include load distribution, to reduce the stress on the materials into which fasteners are driven and therefore reducing damage. 

    Washers are also used as spacers to allow a better fit of fasteners, for example where the fastener is too long, washers can be used to create padding and fill the gap ensuring the fastener doesn't go too deep. Finally, washers can be designed to absorb vibration, especially when used to connect objects with hard surfaces and a lot of movement.

    The Advantages of Using Butyl Washers

    There are countless advantages to using butyl rubber washers in your projects as the material offers many excellent properties, characteristics and uses.  It’s a flexible material even at low temperatures with a wide operating temperature of  -40°C to +140°C and is pre-manufactured in a range of thicknesses ready for converting into gaskets, washers and other products.

    Solid Butyl resists degradation caused by UV, weathering, heat, moisture and some acids and alkaline chemicals. Its structure is impermeable to gas and compressed air, making it an excellent choice for air retention, therefore perfect for creating gas and air seals. As we manufacture butyl washers on-site, we can offer them in bespoke sizes, in any quantity and supplied with a choice of self-adhesive or foil backings.

    Benefits of Butyl Washers

    • UV & Ozone resistant
    • Impermeability to gases, compressed air and moisture
    • wide operating temperature range (-40°C - +140°C)
    • Excellent sealing properties
    • anti-vibration properties
    • Flexible with resistance to flex cracking
    Have a Question about Butyl Washers?

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