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Class 0 Foam

We stock a range of acoustic Class 0 foam products, perfect for industrial, commercial and domestic applications. Foams with a Class 0 fire rating have attained the highest possible level of fire resistance of any flexible acoustic foam product available on the market.

If you would like to discuss our range of fire resistant Class 0 foam products with a member of our team, please feel free to contact us. We’ll be happy to answer any questions you may have about these products and their suitability for your intended application. Call us on 01494 441177 or send us a message via our contact page.

Fireseal Class 0 Acoustic Foam Sheets

Pyrosorb Fireseal Class 0 Acoustic Foam Sheets
Fireseal™ Class 0 is an acoustic foam with the highest available level of fire resistance of any flexible acoustic foam. It has a high-velocity airflow, does not shred and is resistant to most fungus and bacteria. Used for acoustic treatment in various buildings, vehicles and machinery.

PDF download Download Fireseal Specification PDF

Foam Sheet Size

Foam Thickness


Fireseal Class 0 Foam Self Adhesive Sheets

Fireseal Adhesive Backed Class 0 Foam
Fireseal™ is an acoustic foam with a Class 0 fire resistance. It does not shred in high-velocity airflow and is resistant to most fungus and bacteria. This is a self-adhesive backed product designed for easy installation.

PDF download Download Fireseal Specification PDF

Foam Sheet Size

Foam Thickness


Self Adhesive Class 0 Foam Tiles

We also stock acoustic foam tiles with a Class 0 fire rating. These come with a self-adhesive backing for simple installation. All you need to do is remove the yellow backing liner and firmly place onto your surface of choice. The tiles are black in colour and have a classic wedge profiling. They have been expertly CNC cut for precision. Each pack contains 24 tiles. If you are interested in learning more about this product, please visit the dedicated product page by pressing the product image or feel free to contact us.

Why Choose Class 0 Foams?

Class 0 foams are flexible, lightweight and offer superior levels of fire retardancy when compared to standard polyurethane (PU) acoustic foams. When exposed to a naked flame, these self-extinguishing foams do not melt or drip, making them excellent for use in a wide variety of buildings to help maximise fire safety standards.

Common Applications

Class 0 foams such as Fireseal can be found utilised across a range of areas. Here are some popular applications and industries that use Fireseal foam.

Applications Fireseal

  • Sound absorption panels for construction projects.
  • Heating, ventilation and air conditioning (HVAC).
  • Power generator enclosures and engine bay compartments.
  • Ventilation ductwork and equipment internal lining.
  • Engine room sound absorption.
  • Suspended ceiling acoustic void barriers.
  • Original equipment manufacturers (OEM).
  • Vehicles (automotive, buses, tractors, excavators & more).
  • Wall linings
  • Renewable energy structures.
  • Window reveal liners.
  • Dyno test centres (engine tuning).
  • Custodial mattresses.
  • Military vehicles (M.O.D).
  • Marine acoustics.
  • Acoustic enclosures.

These are just a few examples of the many areas that Class 0 foam is used. If you have a particular application in mind and would like to ask us about the suitability of our products, get in touch and speak to one of our experts.

Fireseal Foam Specifications

These are the product specifications for our Fireseal Class 0 foam. If you have any questions about this product or any others, please feel free to contact us for assistance.

Type  Impregnated PU Foam
Colour Dark Grey
Density >90kg/m3
Thickness 6mm – 100mm
Operating Temperature -30ºC to 100ºC
Fire Performance EN 13501-1 Euro Class* B-s1,d0
BS 476 Part 6 Fire Propagation Index <12 >6mm
BS 476 Part 7 Surface Spread of flame Class 1
Building Regulations Paragraph A13 (b) Class 0
ASTM E84-09 Surface Burning Characteristic Flame Spread index 10
Smoke Developed Index 20
ASTM C411-04 Hot Surface Performance @100ºC 96hr Pass
UL94 Classification 94-V-0
ASTM C1071-05 12.7 Air Erosion Resistance 6 – 50mm Pass
ASTM D-2020-92 Mildew (Fungus) Resistance Does not support growth
ASTM G21-96 Fungus Resistance Test Does not support growth
ASTM C1104-06 Water Vapour Sorption <9%
ASTM C518-04 Thermal Conductivity 0.32 Btu-in/ft2-hrºF @6mm

*Certification of Euroclass 6mm – 50mm adhered, 50mm unadhered

Acoustic Performance

Sound Absorption @ 12mm αw 0.30
Sound Absorption @ 25mm αw 0.45
Sound Absorption @ 75mm αw 0.75


Self Adhesive Class 0 Foam

Many of our products including our Fireseal foam range come with the choice of a self-adhesive backing solution. This makes it easy for you to mount your class 0 acoustic foam to your surface of choice, without needing to source your own adhesive solution. This all-in-one product is especially useful for projects where time and practicality are of the essence such as shop fitting projects, construction work and many other types of installations.

Guide to Using Self Adhesive Class 0 Foam

Using our self adhesive Class 0 foam is simple. All you need to is carefully remove the release liner (backing paper) and firmly place your tiles, panels or sheets onto your surface of choice. Our products come equipped with a strong adhesive but be sure to apply enough pressure to allow the glue to properly tack to your required surface.

For optimal adhesion, surfaces should be dry and dust free when placing your acoustic foam products. If using a chemical solution to clean your surface we would recommend that you first test this product to ensure that it does not affect the adhesive capabilities of the product.

For an effective bond, ideally areas should be well ventilated with a relative humidity of approximately 40 – 60% (the lower the humidity, the better). Optimal room temperatures are around 18°C – 20°C.

Class 0 Foam FAQ

To help you quickly find answers to questions you may have about our range of Class 0 foam products, we’ve put together a useful guide featuring some questions we’re often asked. If you still need to speak to a member of our team, just get in touch, we’re always happy to help.

What is Fireseal?

Fireseal is a type of Class 0 acoustic foam produced by Carpenter Co. This class “O” foam is simple to cut, an excellent sound absorber and is popularly uses for many applications.

What Fire Specification is Fireseal Foam?

Fireseal Foam has a BS476 Parts 6 & 7 Class “0” and Euro classification B-S1, d0 fire rating. This class 0 foam has the highest possible level of fire resistance of any flexible acoustic foam product.

Are there Other Class 0 Acoustic Foams?

There are a variety of Class 0 foams available on the market including polyurethane (PU) Fireseal and Pyrosorb foam.

What is Class 0 Foam?

A Class 0 foam is a specialist foam that has been developed to be self-extinguishing in order to reduce the spread of flames and level of heat emission. Class 0 is a UK fire retardancy rating classified by UK building regulations.

Why Choose GB Foam For Your Foam Cut To Size?

Our factory is equipped with the latest CNC cutting technology and throughout the years we have employed the most talented freehand foam cutters in the industry. Many members of the team have worked for the company for several decades and their attention to detail and quality control is something that only comes with years of knowledge and experience.

We have many customers who started with us in 1976 and are still working with us today, which we like to think reflects on our vision to be the most dynamic foam converter in our industry. For us no job is too big or too small. We offer the same level of service and delivery whether you are a retail customer ordering one piece of foam from home, or a large manufacturer ordering daily.

40 Years In BUsiness

GB Foam have been offering foam cut to size from our factory since 1976.

Hand Made In The UK

We employ the most talented freehand foam cutters in the industry.

ISO 9001 Quality

Our team work to the ISO 9001 quality standards to guarantee only the best

Super Fast Delivery

All orders placed before 11:00am will be despatched for next working day delivery

5 Year Guarantee

Our foam comes with a 5 year guarantee against faults in manufacture.

Flame Retardant

Our entire range of foam exceed UK safety and flammability standards.

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