Elastomer

Rating

Natural Rubber, Isoprene

4

Butadiene Styrene, Butadiene

4

Butyl

3

Ethylene Propylene

3

Nitrile

4

HNBR

3

Epichlorohydrin

2

Polychloroprene

3

Chlorosulfonated Polyethylene

3

Chlorinated Polyethylene

---

Urethane

4

Polyacrylate

4

Polysulfide

3

Silicone

4

Ethylene acrylic elastomers

---

Fluorosilicone

2

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

2

Fluoroelastomer - Terpolymer

1

Perfluoroelastomer

1