Elastomer

Rating

Natural Rubber, Isoprene

2

Butadiene Styrene, Butadiene

1

Butyl

2

Ethylene Propylene

2

Nitrile

1

HNBR

1

Epichlorohydrin

1

Polychloroprene

1

Chlorosulfonated Polyethylene

1

Chlorinated Polyethylene

---

Urethane

1

Polyacrylate

1

Polysulfide

1

Silicone

4

Ethylene acrylic elastomers

---

Fluorosilicone

3

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

2

Fluoroelastomer - Terpolymer

2

Perfluoroelastomer

2