High Damping Rubber

Product Description

EndoChem RN300 Series is a compression molded high damping synthetic rubber.


  • High Damping Performance
  • Low Compression Set
  • REACH Compliant
  • ROHS Compliant
  • Halogen Free


EndoChem RN300 Series Damped Rubber is typically used for applications in consumer electronics, medical equipment, automotive and industrial markets that require high anti-shock and anti-vibration performance in a small form factor.

Typical Properties

Product LineRN325 RN345RN365
Hardness ASTM D2240 Type A Durometer 15 Sec. Impact @ 23°C254565
Density (g/cm³) ASTM D7921.14 1.251.35
Tensile Strength (MPa) ASTM D412 Die C4.8 11.812.7
Tear Strength (kN/m) ASTM D624 Die C9.8 20 25.89
Elongation (%) ASTM D412 Die C> 500> 500> 300
Compression Set (%) ASTM D395 Method B 22 hrs @ 25°C22 1818
Damping Performance @ 10Hz1.75 @ 7°C1.41 @ 17°C0.87 @ 14°C
Operating Temperature (°C)0 to 700 to 70 0 to 70
UL94 Flammability HBHBHB
RoHS Compliance Yes YesYes
REACH ComplianceYes YesYes
Halogen Free Yes YesYes

Compression Load Deflection – ASTM D575 10mm/min

Product Line RN325RN345RN365
Force at 10% compression (MPa) 0.34 0.92 1.44
Force at 20% compression (MPa) 0.76 1.84 2.81
Force at 30% compression (MPa) 1.31 3.18 4.59
Force at 40% compression (MPa) 2.12 5.43 7.26
Force at 50% compression (MPa) 3.43 9.18 11.41

Storage and Shelf Life

Recommended storage in a temperature controlled room at 18-25°C with a 50% nominal relative humidity. Under these conditions, shelf life is good for up to 12 months from the date of manufacture.

Warranty and Disclaimer: The user is solely responsible for evaluating the product and determining whether it is acceptable for use and suitable for the user’s method of application. EndoChem warrants that each product meets the applicable EndoChem product specification at the time of shipment. If the EndoChem product does not conform to this warranty, then the sole and exclusive remedy is, at EndoChem’s option, replacement of the product or refund of the purchase price.

Limitation of Liability: Except where prohibited by law, EndoChem will not be liable for any loss or damage arising from the EndoChem product, whether direct, indirect, special, incidental or consequential, regardless of the legal theory asserted, including warranty, contract, negligence or strict liability.

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