Elastomer

Rating

Natural Rubber, Isoprene

2

Butadiene Styrene, Butadiene

3

Butyl

1

Ethylene Propylene

1

Nitrile

4

HNBR

---

Epichlorohydrin

---

Polychloroprene

3

Chlorosulfonated Polyethylene

3

Chlorinated Polyethylene

---

Urethane

4

Polyacrylate

4

Polysulfide

3

Silicone

2

Ethylene acrylic elastomers

---

Fluorosilicone

4

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

4

Fluoroelastomer - Terpolymer

3

Perfluoroelastomer

1