Elastomer

Rating

Natural Rubber, Isoprene

1

Butadiene Styrene, Butadiene

4

Butyl

1

Ethylene Propylene

1

Nitrile

4

HNBR

---

Epichlorohydrin

---

Polychloroprene

2

Chlorosulfonated Polyethylene

1

Chlorinated Polyethylene

1

Urethane

4

Polyacrylate

4

Polysulfide

3

Silicone

4

Ethylene acrylic elastomers

---

Fluorosilicone

3

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

1

Fluoroelastomer - Terpolymer

1

Perfluoroelastomer

1