Age Resistance

Type of Rubber Common or
Trade Name
ASTM D1418 Abbreviation ASTM D2000
Abbreviation
MIL-STD-417
Abbreviation
Maximum (Up to 20 Years)
 Silicone  Silicone  Q  FE  TA
 Fluorsilicone  Silastic LS  FVMQ  FK  TA
 Polysufide  Thiokol   T  BK   SA
 Fluorocarbons   Fluorel, Viton  FKM  HK   —
 Polyacrylate   Acrylic  ACM, ANM  DF, DH   TB
Type of Rubber Common or
Trade Name
ASTM D1418
Abbreviation
ASTM D2000
Abbreviation
MIL-STD-417
Abbreviation
Average (5 to 10 Years)
Chlorosulfonated
polyethylene
Hypalon CSM CE
Isobutylene/
Isoprene
Butyl IIR AA, BA RS
Polychloroprene Neoprene CR BC, BE SC
Polyether Urethane Urethane EU BG
Polypropylene oxide Propylene oxide GPO
Ethylene/propylene
diene
Ethylene propylene terpolymer  EPDM  BA, CA  —
Ethylene/propylene Ethylene propylene
copolymer
 EPM  BA, CA
Epichlorophydrin
homopolymer
Hydrin 100, Herclor H  CO   —   —
Epichlorophydrin
ethylene oxide
Hydrin 200, Herclor C  ECO   —   —
Type of Rubber Common or
Trade Name
ASTM D1418
Abbreviation
ASTM D2000
Abbreviation
MIL-STD-417
Abbreviation
Minimum (2 to 5 Years)
1Butadiene/
acrylonitrile
Nitrile, NBR NBR BF, BG, BK, CH SB
Butadiene/styrene SBR SBR AA, BA RS
Cis-polybutadiene Butadiene BR AA RN
Cis 1, 4,
polyisoprene
Natural, pale, crepe NR AA RN
Cis 1, 4,
polyisoprene
Synthetic natural IR AA RN
Polyester urethane  Urthane   AU  —  —

*NBR, when compounded for o-ring seals, may have a shelf life as  high as 10 years when aging resistance requirements are specified in the specification.