Elastomer

Rating

Natural Rubber, Isoprene

4

Butadiene Styrene, Butadiene

4

Butyl

4

Ethylene Propylene

4

Nitrile

2

HNBR

2

Epichlorohydrin

---

Polychloroprene

3

Chlorosulfonated Polyethylene

1

Chlorinated Polyethylene

---

Urethane

4

Polyacrylate

---

Polysulfide

1

Silicone

4

Ethylene acrylic elastomers

4

Fluorosilicone

2

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

2

Fluoroelastomer - Terpolymer

2

Perfluoroelastomer

2