Elastomer	Rating
Natural Rubber, Isoprene	3
Butadiene Styrene, Butadiene	3
Butyl	2
Ethylene Propylene	2
Nitrile	1
HNBR	---
Epichlorohydrin	---
Polychloroprene	3
Chlorosulfonated Polyethylene	---
Chlorinated Polyethylene	---
Urethane	---
Polyacrylate	---
Polysulfide	---
Silicone	---
Ethylene acrylic elastomers	---
Fluorosilicone	1
Tetrafluoroethylene/Propylene	---
Fluoroelastomer - Dipolymer	1
Fluoroelastomer - Terpolymer	1
Perfluoroelastomer	1