Elastomer

Rating

Natural Rubber, Isoprene

4

Butadiene Styrene, Butadiene

4

Butyl

3

Ethylene Propylene

3

Nitrile

4

HNBR

---

Epichlorohydrin

4

Polychloroprene

4

Chlorosulfonated Polyethylene

2

Chlorinated Polyethylene

---

Urethane

4

Polyacrylate

4

Polysulfide

4

Silicone

4

Ethylene acrylic elastomers

---

Fluorosilicone

4

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

2

Fluoroelastomer - Terpolymer

1

Perfluoroelastomer

1