Elastomer

Rating

Natural Rubber, Isoprene

2

Butadiene Styrene, Butadiene

2

Butyl

1

Ethylene Propylene

1

Nitrile

2

HNBR

2

Epichlorohydrin

---

Polychloroprene

2

Chlorosulfonated Polyethylene

1

Chlorinated Polyethylene

---

Urethane

4

Polyacrylate

4

Polysulfide

3

Silicone

2

Ethylene acrylic elastomers

---

Fluorosilicone

1

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

2

Fluoroelastomer - Terpolymer

1

Perfluoroelastomer

1