Elastomer

Rating

Natural Rubber, Isoprene

2

Butadiene Styrene, Butadiene

3

Butyl

2

Ethylene Propylene

2

Nitrile

1

HNBR

1

Epichlorohydrin

---

Polychloroprene

2

Chlorosulfonated Polyethylene

1

Chlorinated Polyethylene

1

Urethane

---

Polyacrylate

---

Polysulfide

4

Silicone

4

Ethylene acrylic elastomers

---

Fluorosilicone

4

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

1

Fluoroelastomer - Terpolymer

1

Perfluoroelastomer

1