Elastomer	Rating
Natural Rubber, Isoprene	4
Butadiene Styrene, Butadiene	4
Butyl	4
Ethylene Propylene	4
Nitrile	2
HNBR	2
Epichlorohydrin	---
Polychloroprene	4
Chlorosulfonated Polyethylene	4
Chlorinated Polyethylene	---
Urethane	---
Polyacrylate	---
Polysulfide	4
Silicone	2
Ethylene acrylic elastomers	---
Fluorosilicone	---
Tetrafluoroethylene/Propylene	---
Fluoroelastomer - Dipolymer	2
Fluoroelastomer - Terpolymer	1
Perfluoroelastomer	1