Elastomer

Rating

Natural Rubber, Isoprene

4

Butadiene Styrene, Butadiene

4

Butyl

2

Ethylene Propylene

2

Nitrile

2

HNBR

---

Epichlorohydrin

---

Polychloroprene

3

Chlorosulfonated Polyethylene

4

Chlorinated Polyethylene

---

Urethane

4

Polyacrylate

4

Polysulfide

4

Silicone

2

Ethylene acrylic elastomers

---

Fluorosilicone

4

Tetrafluoroethylene/Propylene

1

Fluoroelastomer - Dipolymer

4

Fluoroelastomer - Terpolymer

4

Perfluoroelastomer

1