Acoustic Barrier Foam Gaskets

Advanced Seals and Gaskets Ltd are leading manufacturers of gaskets, producing 1000’s gaskets daily using state of the art machinery, housed in our newly renovated facilities.  Inhouse design and manufacturing enable us to work closely with our customers and provide high-quality gaskets to match their specifications, drawings or samples, whilst keeping lead times to a minimum as we do not need to rely on external third party manufacturers, from a simple picture frame gasket to more complex shapes with cut-outs, notches or bolt-holes, we have a machine designed to quickly and accurately produce perfectly formed gaskets every time.

One speciality material we use to convert gaskets is class ‘O’ acoustic polyurethane foam with a barrier sheet.  These specialities, high-grade composite sheets are manufactured using the class ‘o’ acoustic polyurethane which is split from blocks and then laminated with mass loaded vinyl barrier material which is usually manufactured in sheet form due to the weight of the product. 

As our class ‘o’ acoustic barrier gaskets are cut in-house, we are able to offer any thickness up to 100mm and in a range of composite combinations 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 are Class ‘O’ Acoustic Polyurethane with Barrier Gaskets?

There are many types of Polyurethane materials we can use to cut gaskets,  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. 

The mass loaded vinyl or MLV is a thick flexible material that has been specifically designed for soundproofing.  Its made up using a combination of calcium silicate or barium sulfate which create the sound deadening property, combined with vinyl which makes the material flexible for easier installation. Class ‘o’ acoustic foam barrier gaskets can take the form of a strip or pad but are generally an intricately cut shaped piece of material placed between two surfaces to create a low-pressure seal preventing the intrusion of dust and debris and to absorb sounds within enclosures or machinery and equipment.

Acoustic Barrier Foam Gaskets

Product Enquiry

For information on Acoustic Barrier Foam Gaskets 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 Acoustic Barrier Foam Gaskets

    Samples can be submitted for testing upon request.

    Call now for sample requests or further help.

    Why use Class ‘O’ Acoustic Polyurethane with Barrier Gaskets?

    Class ‘O’ Acoustic Polyurethane with Barrier (MLV) sheets have 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 even when cut into small pads or gaskets.

    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 fill gaps between fixtures and fittings, within engines, machinery or enclosures.   

    The addition of the mass loaded vinyl barrier to the acoustic foam, enables the composite sheet to be used for blocking out everyday sounds and noise from loose or moving parts or reduce the running sound from engines or machinery.

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

    Using Class ‘O’ acoustic polyurethane foam barrier materials offers a huge number of benefits and uses.  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, including gaskets, can be used to assemble soundproof enclosures in which noisy machinery and equipment can be housed and also as fittings 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. 

    The addition of the MLV barrier to the foam creates further features and properties to the acoustic PU foam, it allows the polyurethane foam to block more noise compared to using the foam by itself, its allows for noise absorption rather than blocking it out and finally many soundproofing boards or tiles can be quite rigid and therefore difficult to cut and install, whereas the MLV barrier is flexible, therefore easy to curve and wrap around corners, pipes and to fit perfectly within housings, etc.

    Benefits of using Class ‘O’ Acoustic Polyurethane with Barrier Gaskets

    • Can be used within floor, wall or ceiling linings for soundproofing
    • Reduce unwanted vibration
    • Flame retardant
    • Can be supplied as cut barrier material 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 sheet 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 Gaskets?

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