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General Rubber Guide

ASTM DesignationNamesDurometer (Shore A)Specific Gravity (Polymer)Tensile Strength, Max-psi (Mpa)Low Temperature Brittle Point -°F(°C)High Temperature
Peak Limit -°F(°C)
ResilienceCompression SetHeat AgingAbrasion ResistanceTear StrengthFlame RetardanceWeatheringOxidation ResistanceOzone ResistanceOil ResistanceAcid ResistanceAlkali ResistanceComments
EPDMEthylene-PropyleneDiene Monomer40-900.862000 (13.8)-70 (-58)350 (177)G to EGEGPPEEEPEEOzone resistanceGood extendibility
NBRNitrile (Buna-N)Acrylonitrile-butadiene40-901.002500 (17.3)-60 (-51)275 (135)GGGGFPF to PGFEGGOil and fuel resistance
CRNeopreneChloroprene40-901.242500 (17.3)-65 (-54)275 (135)G to EF to GGGGGG to EG to EG to EGG to EG to EFlame and weather resistance
NRNatural RubberIsoprene30-900.923500 (24.1)-70 (-58)221 (105)EGFEEPPGPPF to GF to GTensile strength and tear resistance
IRSynthetic RubberPolyisoprene30-900.823000 (20.7)-70 (-58)221 (105)GGF to GG to EFPPFPPF to GF to GSynthetic natural rubber
SBRStyrene-Butadiene40-800.922500 (17.3)-70 (-58)239 (115)GGF to GG to EF to GPPF to GPPF to GF to GAbrasion resistance
IIRButylIsobutene-isoprene40-800.922000 (13.8)-70 (-58)250 (121)PFG to EGGPG to EEG to EPEELow gas permeability
BRPolybutadiene40-800.932000 (13.8)-100 (-73)220 (104)EGF to GEGPFFPPFFExcellent resilience, when blended with other polymers.
Legend: P = Poor F = Fair G = Good E = ExcellentThis information is provided as a general reference of basic polymer properties and is intended a a guideline only. Contact us with your specific needs.

Specialty Rubber Guide

ASTM DesignationNamesDurometer (Shore A)Specific Gravity (Polymer)Tensile Strength, Max-psi (Mpa)Low Temperature Brittle Point -°F(°C)High Temperature
Peak Limit -°F(°C)
ResilienceCompression SetHeat AgingAbrasion ResistanceTear StrengthFlame RetardanceWeatheringOxidation ResistanceOzone ResistanceOil ResistanceAcid ResistanceAlkali ResistanceComments
MQ (specialty)SiliconePolysiloxane40-80.95-1.61500 (10.3)-90 to -180 (-68 to -118)600 (315)F to EF to GEPPF to GEEEEGEBroad servicetemperature range
FKMFluoroelastomer55-901.852000 (13.8)-40(-40)500 (260)F to GF to GEGFEEEEEG to EP to GHeat andchemical resistance
AU (Ester)EU (Ether)Urethane35-951.05-1.258000 (55.2)-80 to -20(-62 to -29)220 (104)GFGEEPEGEGPPGood tensile strength Note: polyesters and polyethershave different fluid resistance properties
AEMEthylene-acrylic40-901.08-1.123000 (20.7)-75(-59)350 (177)PGEGGPEEEGFF to GHeat resistance
ECOEpichlorohydrin40-801.27-1.362000 (13.8)-40(-40)275 (135)GPG to EF to GF to GFEGEEPFExcellent fluid and hightemperature resistance
CSMChlorosulfonated Polyethylene40-901.183000 (20.7)-70(-57)275 (135)FF to GG to EG to EFGEEEGG to EEExcellent weather resistance
CPEChlorinated Polyethylene50-901.16-1.322000 (13.8)-70(-57)300 (149)FGGGFGGEEGG to EEWire and Cable
HNBRHydrogenated Nitrile30-95.98-1.003500 (24.1)-70(-57)325 (163)GGG to EGF to GPGG to EEEGGSimilar to NBR. Best in high flex, high tensile applications.
ACM Polyacrylate40-9512000 (13.8)-40(-40)400 (204)F to GF to GGF to GP to FPEEG to EEFPGood dynamic properties and flame resistance
Legend: P = Poor F = Fair G = Good E = ExcellentThis information is provided as a general reference of basic polymer properties and is intended a a guideline only. Contact us with your specific needs.