Elastomer

Rating

Natural Rubber, Isoprene

2

Butadiene Styrene, Butadiene

2

Butyl

2

Ethylene Propylene

2

Nitrile

2

HNBR

---

Epichlorohydrin

---

Polychloroprene

2

Chlorosulfonated Polyethylene

3

Chlorinated Polyethylene

3

Urethane

3

Polyacrylate

4

Polysulfide

2

Silicone

2

Ethylene acrylic elastomers

---

Fluorosilicone

4

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

4

Fluoroelastomer - Terpolymer

4

Perfluoroelastomer

1