Elastomer

Rating

Natural Rubber, Isoprene

3

Butadiene Styrene, Butadiene

4

Butyl

2

Ethylene Propylene

2

Nitrile

1

HNBR

1

Epichlorohydrin

2

Polychloroprene

2

Chlorosulfonated Polyethylene

1

Chlorinated Polyethylene

1

Urethane

1

Polyacrylate

---

Polysulfide

3

Silicone

1

Ethylene acrylic elastomers

---

Fluorosilicone

1

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

1

Fluoroelastomer - Terpolymer

1

Perfluoroelastomer

1