Elastomer

Rating

Natural Rubber, Isoprene

4

Butadiene Styrene, Butadiene

4

Butyl

3

Ethylene Propylene

3

Nitrile

1

HNBR

1

Epichlorohydrin

---

Polychloroprene

2

Chlorosulfonated Polyethylene

3

Chlorinated Polyethylene

---

Urethane

3

Polyacrylate

---

Polysulfide

2

Silicone

4

Ethylene acrylic elastomers

---

Fluorosilicone

2

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

1

Fluoroelastomer - Terpolymer

1

Perfluoroelastomer

1