Elastomer

Rating

Natural Rubber, Isoprene

4

Butadiene Styrene, Butadiene

4

Butyl

4

Ethylene Propylene

4

Nitrile

2

HNBR

---

Epichlorohydrin

---

Polychloroprene

3

Chlorosulfonated Polyethylene

3

Chlorinated Polyethylene

3

Urethane

2

Polyacrylate

4

Polysulfide

2

Silicone

4

Ethylene acrylic elastomers

---

Fluorosilicone

2

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

1

Fluoroelastomer - Terpolymer

1

Perfluoroelastomer

1