This standard specifies the properties of ethylene-propylene rubber (EPM/EPDM) . hardness 80 IRHD. for aerospace applications.
note:1) Symbol as per ISO 1629
BS EN 2431:1995 history
1995BS EN 2431:1995 Ethylene-propylene rubber (EPM/EPDM) - Hardness 80 IRHD