Elastomer

Rating

Natural Rubber, Isoprene

2

Butadiene Styrene, Butadiene

1

Butyl

1

Ethylene Propylene

1

Nitrile

2

HNBR

---

Epichlorohydrin

2

Polychloroprene

1

Chlorosulfonated Polyethylene

1

Chlorinated Polyethylene

1

Urethane

3

Polyacrylate

---

Polysulfide

---

Silicone

2

Ethylene acrylic elastomers

---

Fluorosilicone

3

Tetrafluoroethylene/Propylene

2

Fluoroelastomer - Dipolymer

3

Fluoroelastomer - Terpolymer

4

Perfluoroelastomer

1