Elastomer

Rating

Natural Rubber, Isoprene

2

Butadiene Styrene, Butadiene

2

Butyl

2

Ethylene Propylene

2

Nitrile

2

HNBR

---

Epichlorohydrin

---

Polychloroprene

2

Chlorosulfonated Polyethylene

2

Chlorinated Polyethylene

1

Urethane

4

Polyacrylate

4

Polysulfide

2

Silicone

2

Ethylene acrylic elastomers

4

Fluorosilicone

2

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

2

Fluoroelastomer - Terpolymer

2

Perfluoroelastomer

1