Elastomer

Rating

Natural Rubber, Isoprene

4

Butadiene Styrene, Butadiene

4

Butyl

3

Ethylene Propylene

2

Nitrile

4

HNBR

2

Epichlorohydrin

---

Polychloroprene

4

Chlorosulfonated Polyethylene

1

Chlorinated Polyethylene

1

Urethane

---

Polyacrylate

4

Polysulfide

4

Silicone

2

Ethylene acrylic elastomers

---

Fluorosilicone

2

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

2

Fluoroelastomer - Terpolymer

1

Perfluoroelastomer

1