Expanded / Sponge / Foam — Multi-Polymer Range

Sponge & Cellular Rubber

Sponge and cellular rubber provides lightweight, compressible sealing across multiple polymer types. We stock closed-cell and open-cell expanded rubber in EPDM, neoprene, silicone, and nitrile for cushioning, thermal insulation, vibration dampening, and low-pressure environmental sealing applications.

At a Glance

Temperature Range

Depends on polymer (-60 °C to +230 °C)

Thickness Range

0.8 mm to 40 mm

Hardness Range

Soft to medium (sponge density rated, not Shore A)

Brands We Stock

DurafoamGardinerJehbco
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Technical Properties

Typical values across stocked grades. Specific grade data sheets available on request.

Temperature Range-60 °C to +230 °C (depends on polymer)
Thickness Range0.8–40 mm stocked
Cell StructureClosed-cell (sealed) / Open-cell (breathable)
Polymer OptionsEPDM, Neoprene (CR), Silicone (VMQ), Nitrile (NBR)
Density (ASTM D1056)80–400 kg/m³, varies by grade
Compression Deflection (ASTM D1056)25–75% at rated load
Compression Set (ASTM D395)10–30% (closed-cell grades)
Water Absorption (ASTM D1056)<5% by volume on closed-cell grades
Ozone Resistance (EPDM/CR)Excellent; no degradation
Flame Resistance (CR grades)Self-extinguishing, UL 94 HBF rated
ASTM C509 / C1166 (Neoprene)Available; meets building seal specifications
FDA Available (VMQ)Yes (silicone sponge, 21 CFR 177.2600)

Common Applications

  • HVAC duct sealing and insulation
  • Enclosure and cabinet door gaskets
  • Anti-vibration pads and mounts
  • Thermal insulation strips and wraps
  • Low-pressure environmental seals
  • Packaging cushioning and protective padding
  • Acoustic dampening panels and liners
  • Pipe insulation and lagging seals
  • Expansion joint fillers
  • Weather stripping and draught sealing

Available Grades

Brands we stock: Durafoam, Gardiner, Jehbco

EPDM Sponge (EP140)

Closed-cell EPDM sponge with excellent weather, ozone, and UV resistance. Our most popular sponge grade for outdoor and HVAC sealing applications.

EPDM Sponge (E4388)

Medium-density closed-cell EPDM conforming to E4388 specification. Good compression set resistance for long-term sealing applications.

Neoprene Sponge (CR-160)

Medium-density closed-cell neoprene sponge with moderate oil and flame resistance. Used in marine, HVAC, and general industrial cushioning.

Neoprene Sponge (ASTM D1056 2C-grades)

Closed-cell neoprene classified to ASTM D1056 (Type 2 Class C — oil-resistant). Good all-round resistance and widely specified for weather sealing and vibration isolation.

Silicone Sponge

Food Safe

Closed-cell silicone sponge for extreme temperature sealing from -60 °C to +230 °C. FDA grades available for food and pharmaceutical applications.

Nitrile Sponge (NBR Foam)

Closed-cell nitrile foam with oil and fuel resistance. Used for cushioning and sealing in environments with hydrocarbon exposure.

PVC/Nitrile Closed-Cell Foam

Closed-cell foam blending PVC weather resistance with nitrile oil resistance. Combines the UV and ozone tolerance of PVC with the hydrocarbon compatibility of NBR in a single compound. Used for outdoor industrial enclosure seals and HVAC gaskets where both weather exposure and moderate oil contact are expected.

Related Resources

Chemical Compatibility

Check sponge rubber base polymer resistance to specific chemicals.

Sheet Rubber Selection

Compare base polymers side by side to choose the right sponge compound.

Shore Hardness Guide

Understand durometer and density scales for solid and sponge rubber.

Related Materials

EPDM Neoprene (CR) Silicone (VMQ)

Need Sponge & Cellular Rubber?

We supply sponge & cellular rubber in sheet, roll, and custom die-cut forms. Contact our team for pricing, data sheets, or technical assistance.

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Disclaimer

This resource is provided for general engineering reference only and does not constitute professional advice, specification, or guarantee of performance. Actual results depend on specific application conditions. Universal Gaskets Pty Ltd accepts no responsibility or liability for decisions made based on this information. For full terms, see our Terms & Conditions.