Class ‘O’ Acoustic Polyurethane Foam with Barrier

Advanced Seals and Gaskets Ltd pride themselves on being one of the UK’s largest suppliers of non-metallic materials including foams, sponges, rubber, plastics and specialist papers.  One such material is Class O acoustic foam which is cut in-house using our state of the art splitting machinery, allowing us to keep our lead times low, prices competitive whilst producing high-quality products. 

Our Class ‘O’ acoustic foam sheets are cut from 2-meter x 1-meter master blocks, in any thickness up to 100mm without laminations.  Our onsite conversion and laminating facilities enable us to create composite sheets using the acoustic foam and layers of a mass loaded vinyl barrier, which can be supplied plain, self-adhesive backed or with a foil backing.

What is Class ‘O’ Acoustic Polyurethane with Barrier?

There are many types of Polyurethane materials,  one of which is Class O acoustic foam.  This particular variety of material is open cell, lightweight, flame retardant, non-dusting, doesn’t support mildew or fungal growth and has s excellent thermal insulation and noise absorption properties.  

The addition of the mass loaded vinyl barrier layer creates a composite material, which is designed to reduce noise within enclosed areas, whilst being fire resistant.  Generally, the mass loaded vinyl barrier is sandwiched between 2 layers of acoustic foam, however, more than one layer can be added depending upon the level of soundproofing required. 

The barrier sheets are available in 3 weights and thicknesses as standard, 5kg (2.5 - 3mm thick), 7.5kg (3 - 4mm thick) and 10kg (4-5mm thick), the heavier the weight, the more soundproofing properties the sheet will offer.

Class 'O' Acoustic Polyurethane Foam With Barrier

Product Enquiry

For information on Class ‘O’ Acoustic Polyurethane Foam with Barrier please complete the following quick enquiry or call us on +44(0)1384 252555.






    Product Specification & Key Characteristics

    • Colour: Anthracite
    • Density: <90KG/M³ (acoustic foam layer)
    • Fire Propagation Index: <12
    • Flammability Standards: Class O Acoustic Foam: tested in accordance with BS476 part 6 & 7 UL94 V-0 flammability rating
    • Barrier: Self-extinguishing (FMVSS302)
    • Operating Temperature: -30°C to 100ºC
    • Thickness: 1mm – 100mm (can be laminated for greater thickness)

    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 Class ‘O’ Acoustic Polyurethane Foam with Barrier

    Samples can be submitted for testing upon request.

    Call now for sample requests or further help.

    Why use Class ‘O’ Acoustic Polyurethane with Barrier?

    Class ‘O’ Acoustic Polyurethane with Barrier has been designed for use where a high degree of soundproofing is required within enclosed areas.  The creation of the composite barrier sheet combines a noise barrier and sound absorber into a single product, which also helps with sound transmission loss and vibration dampening.  

    Being a class ‘O’ material, these sheets are flame retardant, making them safe to use in a range of industries including HVAC, construction and automotive where they are often found used to line walls and ceilings, plant rooms or enclosures for noisy machinery.     

    The Advantages of using Class ‘O’ Acoustic Polyurethane with Barrier

    Using Class ‘O; acoustic polyurethane foam barrier sheets offer a huge number of benefits and use. Not only do they help with soundproofing, but they also act as sound and vibration absorption panels, and can help sound transmission loss. 

    These sheets and products can be used to create soundproof enclosures in which noisy machinery and equipment can be housed and also as linings within automotive and HVAC applications. 

    As the class ‘o’ foam is flame retardant, it is often one of the safest materials to use within building and construction for soundproofing underlay under flooring, combined with plasterboard on walls and ceilings, especially studios or home cinema rooms and even within engine rooms such as on marine vessels.

    Benefits of using Class ‘O’ Acoustic Polyurethane with Barrier

    • Can be used as floor, wall or ceiling linings for soundproofing
    • Reduce unwanted vibration
    • Flame retardant
    • Can be supplied as a barrier sheet alone or laminated between acoustic foam
    • Sheets can be cut down into smaller parts such as pads, strips or even gaskets
    • Available in various thicknesses and weights
    • Doesn’t support mildew or fungal growth

    Different Types Available

    The soundproofing barrier material can be supplied in a range of formats, as the mass loaded vinyl barrier alone, alternatively, it can be supplied laminated to class ‘o’ acoustic foam to create composite sheets.

    Mass loaded vinyl barrier is available in 3 weights:

    5kg - thickness approx 2.5mm - 3mm (Acoustic performance 26 dB approx)

    7.5kg  - thickness approx 3mm - 4mm

    10kg - thickness approx 4mm - 5mm (Acoustic performance 32 dB approx)

    Finishes: Class ‘O’ acoustic Polyurethane foam with Barrier can be supplied plain, with a self-adhesive face to allow for quick and easy installation, or covered with a foil face with the option of a scrim lined foil, which increases the insulation properties of the acoustic barrier sheets even further.

    Have a Question about Class ‘O’ Acoustic Polyurethane with Barrier?

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