The shelf life of molded parts assumes storage in controlled environmental conditions, both in terms of temperature and humidity. The following list, taken from MIL_HDBK-695C, is a good reference.
Maximum (up to 20 years)
Silicone
Fluorocarbon
Average (5 to 10 years)
EPDM
Butyl
Polychloroprene
Polyether urethane
Epichlorohydrin
Minimum (3 to 5 years)
Nitrile, Buna N
SBR
Natural Rubber
Polyester urethane
Access more articles in our Rubber Knowledge Center and our Urethane Knowledge Center.
