Polyurethane Class O Acoustic Foam

Polyurethane Class O Acoustic Foam is an open-cell polyurethane acoustic foam designed for applications requiring improved fire performance. It provides effective sound absorption and vibration damping, while its relatively high density, greater than 100 kg/m³, helps reduce resonance and airborne noise within equipment enclosures and panel structures.

At PAR Group, we supply Class O polyurethane acoustic foam for applications that require acoustic performance and enhanced fire resistance. The material achieves a B-s2, d0 reaction to fire classification in accordance with EN 13501-1, as well as Class 0 in accordance with BS 476 Parts 6 and 7. It also provides a wide operating temperature range of -40°C to +110°C, making it suitable for a variety of demanding environments.

We supply all these sheets with self-adhesive backing, as standard. If you require one of the below, just the sheet without the backing applied, then please state this upon enquiry.

For further information regarding the material specifications, please see the availability section below. Alternatively, to buy online, please select the 'Buy Online' button above.

Applications

This foam is suitable for acoustic insulation, sound absorption and noise reduction in applications where improved fire performance is also required. Its high density helps reduce resonance and airborne noise, making it suitable for use in equipment enclosures, machinery and panel structures.

Common applications include acoustic equipment enclosures, machine and equipment panels, and acoustic panels and noise-control applications, where the foam helps absorb sound and reduce vibration and resonance.

Key Features

• Temperature: -40°C up to +100°C.
• Reaction to fire classification: B-s2, d0 in accordance with EN 13501-1.
• Class 0 fire performance in accordance with BS 476 Parts 6 and 7.
• UL94 V-0 and 94-5V classifications.
• Fire Propagation Index: <12 in accordance with BS 476 Part 6.
• Surface Spread of Flame: Class 1 in accordance with BS 476 Part 7.
• Easy to handle and install.
• Index of Toxicity: <3.0 in accordance with NES 713.

Standards

• Provides a B-s2, d0 reaction to fire classification in accordance with EN 13501-1:2007+A1:2009, tested in accordance with EN ISO 11925-2 and EN 13823.
• The material also achieves Class 0 in accordance with BS 476 Parts 6 and 7, with a Fire Propagation Index of less than 12 and a Surface Spread of Flame classification of Class 1.
• Provides a UL94 V-0 classification and is also classified 94-5V in accordance with UL 94.

Availability

Note: May be available in rolls if required, please enquire. 

We supply all these sheets with self-adhesive backing, as standard. If you require one of the below, just the sheet without the backing applied, then please state this upon enquiry.

Standard (Plain)

Our standard-grade polyurethane Class O acoustic foam is designed for general-purpose applications and meets the requirements of British building and construction regulations. It is widely used in a range of applications to isolate noise and is a popular material for enclosing machinery. It can also be used as absorptive panels in residential, commercial and industrial environments. This sheet comes with a self-adhesive backing as standard; however, we can provide it without upon request.

Class O Foil Faced

A foil-backed acoustic foam that is popular in marine applications or on duct linings (HVAC) when a polymeric sound barrier is required. It can be easily cleaned and offers effective resistance to moisture and oils due to the facing. This sheet is supplied with a self-adhesive backing as standard, although a non-adhesive version is available upon request.

Pyrosorb Class O Polyrethane Foam

Pyrosorb-S is a Class O fire-rated polyurethane open-cell foam, engineered for superior flame resistance and safety. Impregnated with advanced resins for added performance, it also absorbs over 70% of sound, making it an excellent acoustic solution for noise-sensitive spaces.

CFC-free and designed for high reliability.
 

Melinex® Faced

Melinex® faced (polyester film) acoustic foam provides an effective layer of resistance to chemicals, solvents and temperatures. The film does not limit the material's sound insulation capability. A self-adhesive backing is provided as standard; non-adhesive options are available upon request.

SVG1 Vinyl Glass Cloth Faced

A flame-retardant, SVG1 glass cloth-faced polyurethane acoustic foam that provides effective resistance to a wide range of chemicals. It can be easily cleaned and is commonly used in areas where high levels of cleanliness are required. This material is supplied with a self-adhesive backing as standard, with non-adhesive alternatives available upon request.

200gsm Woven Glass Cloth

Providing enhanced temperature resistance due to the woven glass cloth facing, this option is commonly used in environments that require heat deflection. The standard version features a self-adhesive backing, although sheets without adhesive backing can be supplied upon request.

S-V1 Polymeric

A polyurethane acoustic foam with an S-V1 polymeric coating that provides effective resistance to aromatic hydrocarbons and moisture. This option is popular in automotive applications, engine rooms and HVAC systems to help isolate noise. Self-adhesive backing is included as standard, while a version without adhesive backing is also available upon request.

Technical Specification: