RATING

APPROVED

BEST AA

FEP - Teflon

A

FKM - Fluorocarbon - Viton

A

IIR - Isobutylene Isoprene - Butyl

A

Isobutylene Isoprene (IIR) - Butyl

B

FFKM - Chemraz - Kalrez

B

Kalrez - Perfluorinated Copolymer - FFKM (same as above)

NOT APPROVED

B

EP - Ethylene Propylene - EPDM

B

EPDM - Ethylene Propylene

NR

CR Chloroprene - Neoprene

NR

HNBR - Hydrogenated Nitrile

NR

Styrene Butadiene - SBR - BUNA-S

NR

Polyacrylate - ACM

NR

Polyurethane - AU, EU

NR

Polybutadiene - BR

NR

Aero Quip - AQP

NR

IIR - Sythetic Isoprene, Synthetic Polyisoprene, Synthetic Rubber

NR

NR - Natural Isoprene - Natural Rubber

NR

CSM - ChloroSulfanated Polyethylene - CSM - Hypalon

NR

FVMQ - Fluorosilicone