Acoustic Foam Washers

Acoustic Foam Washers

Class O Acoustic Foam Washers – Noise, Vibration, and Thermal Management Solutions

At Advanced Seals & Gaskets Ltd, we specialise in the production of acoustic foam washers, crafted from Class O acoustic foam for a wide range of industrial, automotive, marine, and construction applications. Designed to combine sound absorption, vibration reduction, and flame retardancy, these washers provide versatile and reliable solutions for engineers, manufacturers, and facility managers.

Our in-house manufacturing capabilities, including specialised presses, kiss-cut machines, and CNC equipment, enable the production of washers in any size, thickness, and quantity, with options for plain, self-adhesive, or laminated finishes. This ensures precision, quality, and minimal lead times for our clients.

What Are Acoustic Foam Washers?

Acoustic foam washers are precision components manufactured from Class O polyurethane foam, an open-cell, lightweight material known for its exceptional sound control, vibration damping, and thermal insulation properties. Unlike traditional foam, Class O acoustic foam does not eliminate sound entirely but reduces noise and echo by attenuating sound waves, dissipating energy as heat.

These washers serve multiple purposes, including:

  • Cushioning and padding moving parts

  • Reducing vibration and mechanical rattling

  • Providing gap filling and sealing between uneven surfaces

  • Offering flame retardant and thermal insulation properties

Class O acoustic foam is non-toxic, dust-free, HCF & CFC free, and resistant to fungal growth, making it suitable for demanding environments in marine, construction, automotive, HVAC, and manufacturing sectors. Its soft and pliable nature allows easy cutting and shaping for complex surfaces, ensuring efficient installation and long-lasting performance.

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Product Enquiry

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






    Product Specification & Key Characteristics

    • Colour: Anthracite

    • Density: <90 kg/m³

    • Fire Propagation Index: <12

    • Flammability Standards: Tested to BS476 part 6 & 7; UL94 V-0 rating

    • Operating Temperature: -30°C to 100°C

    • Thickness: 1mm – 100mm (laminatable for greater thickness)

    • Forms: Plain washers, self-adhesive washers, kiss-cut sheets, or loose parts

    Full technical data sheets are available upon request or can be downloaded from our online portal.

    Product Specification Sheet

    Why Use Acoustic Foam Washers?

    Class O acoustic foam washers are widely used in industries that require noise reduction, vibration control, thermal insulation, and flame retardancy. Common applications include:

    • Construction & HVAC: Insulating ductwork, ventilation systems, and building services

    • Automotive & Marine: Engine rooms, pipework, and machinery requiring soundproofing and vibration control

    • Manufacturing & Machinery: Cushioning equipment, reducing mechanical noise, and protecting components

    • Recording Studios & Engine Rooms: Absorbing vibrations and controlling acoustic performance

    Their durability allows them to withstand high-pressure airflow and repeated mechanical stress without tearing, shedding, or migrating, ensuring long-term performance in ventilation systems, filtration units, and machinery housings.

    Advantages of Acoustic Foam Washers

    Using Class O acoustic foam washers offers a range of benefits:

    • Noise Dampening: Reduces echo and reverberation in walls, floors, and machinery

    • Vibration Absorption: Minimizes mechanical stress and prevents component damage

    • Flame Retardant: Complies with UL94 V-0 and BS476 standards for fire safety

    • Thermal Insulation: Maintains temperature control and protects sensitive equipment

    • Non-Toxic & Dust-Free: Ideal for HVAC, clean rooms, and industrial environments

    • Flexible & Easy to Install: Conforms to irregular surfaces and curved applications

    • Durable & Long-Lasting: Resists tearing, migration, and degradation over time

    • Chemical & Mildew Resistant: Suitable for harsh environmental conditions

    Benefits at a Glance

    • Grease and oil resistance

    • Chemical resistance

    • Non-toxic, dust-free, HCF & CFC free

    • Durable under high mechanical stress

    • Flame retardant and thermally insulating

    • Flexible and easy to shape for complex applications

    • Suitable for a wide range of industries including automotive, marine, construction, and HVAC

    Different Grades & Applications

    At ASG, we produce washers in a wide variety of materials to suit any application. Class O acoustic foam washers are preferred where soundproofing, vibration control, and flame retardancy are critical. Other available materials include:

    • EPDM, Neoprene, Silicone, Solid Rubbers – for seals, chemical resistance, and durability

    • Sponge, Plastics, Polyethylene, PVC, Polyester, Cork, Textiles – for cushioning, gap filling, and insulation

    Our washers can be supplied as plain cut parts, self-adhesive, laminated, or kiss-cut on sheets/rolls, enabling efficient installation and reducing waste.

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     Enquire Now

    For more information or to discuss a bespoke acoustic foam washer solution, contact our team to find the perfect material, size, and finish for your application.

    Have a Question about Acoustic Foam Washers?

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