Elastomer

Rating

Natural Rubber, Isoprene

2

Butadiene Styrene, Butadiene

2

Butyl

4

Ethylene Propylene

4

Nitrile

1

HNBR

1

Epichlorohydrin

1

Polychloroprene

1

Chlorosulfonated Polyethylene

1

Chlorinated Polyethylene

---

Urethane

2

Polyacrylate

2

Polysulfide

2

Silicone

1

Ethylene acrylic elastomers

---

Fluorosilicone

3

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

1

Fluoroelastomer - Terpolymer

1

Perfluoroelastomer

1