EPDM Closed Cell Sponge Rubber

EPDM (Ethylene Propylene Diene Monomer) closed cell sponge rubber material exhibits very good aging properties, compressibility, and shows an excellent resistance to ozone and oxidation, which explains its use in a variety of industrial and commercial applications. Atlantic Gasket Corporation, a Philadelphia-based gasket manufacturer, produces gaskets, seals, and other custom die-cut and waterjet cut parts in EPDM elastomers for customers that span across industry groups and international locations. Our closed cell EPDM sponge is available in soft and medium densities, and each offers a unique set of physical properties. Each grade is available as thin as 1/16" thick up to 2" thick. See if EPDM is the right gasket or seal material for your product by reading the example applications listed below.

Example Gasket Application Properties
Weatherproofing Closed cell EPDM is used for many outdoor industrial gasketing applications for weatherproofing due to its resistance to aging, UV, ozone, and oxidation.
HVAC This rubber sponge material proves beneficial in many HVAC systems and other flexible sealing applications, as it is resistant to compression set and atmospheric degradation.
Automotive Our style RE41EPT is the material of choice for automotive taillight gaskets because of its excellent resistance to ozone and its unique sealing characteristics.
Electrical Enclosures EPDM’s excellent resistance to ozone, UV and oxidation and its closed cell structure allows this material to be used as gasketing for many outdoor electrical enclosures.

Is EPDM the right material for your gasket or seal application? Read on to find out.
  • Does your end application involve exposure to moisture or temperatures as low as –70° F or as high as 220° F? If so, EPDM may be considered a low-cost alternative to silicone for long-term sealing as its closed cell structure minimizes water absorption.
  • Does your end application require a low compression set? If so, Atlantic Gasket’s high grade EPDM is comprised of 100% EPDM rubber, which means that its fluid characteristics and physical properties work to prevent material deformation while under constant stress or pressure.

Atlantic Gasket offers EPDM grades in sheets 48" wide x 80" long, in rolls 48" wide x 50" long or we can custom die-cut or waterjet cut each grade to your exact requirements. Our EPDM gasket and sealing material meets the following specifications:

  • ASTM D 1056-68 RE41
  • ASTM D 1056-68, RE41, ASTM-D-1056-07 2A1 and 1A2
  • ASTM-D 6576-07 Type II, B, C soft and medium
  • MIL-R-6130C Type II Grade B/C condition soft and medium
  • MIL-C-3133C MIL STD 670B RE3

For more technical information on density, test methods, properties, and more, see our closed cell EPDM sponge rubber specification sheets. Contact one of our representatives to see if EPDM is the gasket or seal material of choice for your application.