Cellular Rubber

Cellular rubber is a closed-cell rubber quality, which is produced in various strengths and densities using the expansion process. We at PANA stock cell rubber grades based on EPDM, CR, NBR, SBR and NR and thus cover a wide range of applications.

Due to its closed cell structure, the foam is air- and watertight even without an outer skin. Cellular rubber is often incorrectly referred to as sponge rubber.


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Depending on requirements, we offer the following cell rubber types from our range:

EPDM cellular rubber (also known as APTK):

  • high resistance to external influences such as ozone, light and water
  • good resistance to acids and alkalis as well as high tensile strength
  • have a wide temperature application range. They are still very flexible even at low temperatures and can withstand a maximum temperature of up to 130°C at continuous load.
  • low priced

CR cellular rubber (chlorprene or neoprene):

  • has its strength in fire behavior (usually self-extinguishing)
  • resistant to many different chemicals, including salt water
  • good resistance to ageing

NBR Cellular rubber:

  • particularly resistant to oils and fuels
  • high abrasion resistance and very hard-wearing
  • low compression set, i.e. well suited if the material is subjected to regular mechanical stress

NR Cellular rubber:

  • If only tensile strength, tear strength, elongation and low-temperature flexibility are required, optimum
  • Similar to NBR, NR has a good compression set

semi-closed cell rubber types (usually based on EPDM):

  • compared to the closed cell types, these can be compressed with significantly less force.
  • at a certain compression, the materials still seal

Our benefits

  • wide selection of different cell rubber types in stock; correspondingly short delivery times

  • Customer-specific production (purely order-related production)

  • delivered in various forms: as roll, plate, strip, die-cut parts, blanks, self-adhesive if required

  • ISO 9001:2015 and IATF 16949 certified management system for many years

Can I help you?

You have questions regarding cellular rubber.
Please feel free to contact us!

Haralampos Savidis
Position: Sales

Tel: +49 (0) 8171/ 9341-30
eMail: savidis@panafoamtec.de

Haralampos Savidis

Our range of cellular rubber:

  • Flame-resistant foams (UL94,FMVSS 302, EN 45545 etc.)
  • Low-emission and low-odour types
  • also available as sulphur-free version
  • other special types available as required

Technical Product Table Cellular Rubber:

75 kg/m³ Excellent sealing function Black UL94 Peroxiically cross-linked
95 kg/m³ Low thermal conductivity Beige FMVSS 302 sulphur-free
130 kg/m³ Low water absorption Grey EN 455 45 Semi-closed cell types
150 kg/m³ High temperature and ageing resistance (EPDM) White EN 13501-1 low-emission
175 kg/m³ Flame retardant (especially CR)
330 kg/m³ Sulphur-free if necessary
more on request Black is the standard

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Frequently asked questions about cellular rubber:

  • What is the difference between cellular rubber and cellular rubber?

    Moos rubber and cellular rubber are usually made from the same raw materials, often EPDM, NBR, CR, NR or SBR. The material structure of sponge rubber and cellular rubber differs considerably due to different manufacturing processes.

    Moosgummi is made of driven rubber, has open cells and a dense and robust outer skin. In the field of sponge rubber profiles, a distinction is made between moulded and extruded sponge rubber profiles. For both methods, the surface of sponge rubber profiles and gaskets is better protected against external influences by the dense, robust and elastic outer skin than by cellular rubber. However, if the surface is damaged, the sponge rubber gasket with its open-cell structure can soak up aqueous media due to the capillary effect.

    cell rubber has no outer skin, so the surface is more sensitive and easier to damage. Due to the porous but closed cell structure the penetration of aqueous media is not possible. Cellular rubber seals are thus practically water- and airtight.

  • Is cellular rubber a natural raw material?

    Cellular rubber is a closed-cell elastomer which is available in various strengths and densities. It is produced in the so-called expansion process - on the basis of natural and/or synthetic rubbers, e.g. EPDM and other synthetic elastomers.

    The elastomers provide the basic structure for the rubber compounds, the final properties of the product are determined by further additives such as fillers, plasticizers, antioxidants, cross-linking chemicals and others.

    There are four main groups of cellular rubber compounds or elastomers:

    • Natural rubber (abbreviation NR) is suitable for normal technical purposes without particularly high requirements in terms of temperature, ageing, resistance, etc. The main groups of these rubber compounds are as follows Natural rubber has an average bulk density of approx. 130-160 kg/m³
    • EPDM (obsolete also called APTK) is suitable for outdoor applications and therefore very resistant to ageing, ozone, light, weathering, temperature etc. The EPDM quality also has good light crack resistance. The raw densities are approx. 145 kg/m³
    • Chloroprene rubber (abbreviation CR) is good for high requirements regarding temperature, flammability, oil, acid, alkali and grease resistance as well as weathering, ageing and ozone. The average bulk density is approx. 160-170 kg/m³
    • Nitrile rubber (abbreviation NBR) is an oil-resistant and partly petrol-resistant, also very good weather and ozone-resistant, but combustible quality. The bulk density is approx. 160-200 kg/m³.
  • Is cellular rubber weather resistant?

    Cell rubber is very weather resistant due to its properties. Due to its good UV and ozone resistance, the foam is also used several times outdoors.