Elastomer

Rating

Natural Rubber, Isoprene

4

Butadiene Styrene, Butadiene

4

Butyl

4

Ethylene Propylene

3

Nitrile

3

HNBR

1

Epichlorohydrin

---

Polychloroprene

1

Chlorosulfonated Polyethylene

2

Chlorinated Polyethylene

1

Urethane

---

Polyacrylate

---

Polysulfide

2

Silicone

4

Ethylene acrylic elastomers

4

Fluorosilicone

1

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

1

Fluoroelastomer - Terpolymer

1

Perfluoroelastomer

1