Elastomer

Rating

Natural Rubber, Isoprene

2

Butadiene Styrene, Butadiene

2

Butyl

2

Ethylene Propylene

1

Nitrile

4

HNBR

4

Epichlorohydrin

---

Polychloroprene

2

Chlorosulfonated Polyethylene

2

Chlorinated Polyethylene

---

Urethane

4

Polyacrylate

4

Polysulfide

2

Silicone

3

Ethylene acrylic elastomers

---

Fluorosilicone

2

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

2

Fluoroelastomer - Terpolymer

1

Perfluoroelastomer

1