AGE RESISTANCE COMPARISON

Age resistance generally associated with products fabricated from various rubbers. This table, taken from MIL_HDBK-695C, is quite conservative.

Maximum (up to 20 years)

Silicone
Fluorocarbon

Average (5 to 10 years)

Hypalon
EPDM
Butyl
Neoprene
Polyether urethane
Hydrin

Minimum (3 to 5)

Nitrile, Buna N
SBR
Natural Rubber
Polyester urethane

Use care when using and interpreting this table, because Nitrile when compounded using age resistance additives may have a shelf life of up to 10 years. In addition, warehousing environmental factors affect actual shelf life.