Elastomer

Rating

Natural Rubber, Isoprene

4

Butadiene Styrene, Butadiene

4

Butyl

3

Ethylene Propylene

3

Nitrile

2

HNBR

2

Epichlorohydrin

2

Polychloroprene

3

Chlorosulfonated Polyethylene

4

Chlorinated Polyethylene

---

Urethane

---

Polyacrylate

4

Polysulfide

---

Silicone

2

Ethylene acrylic elastomers

---

Fluorosilicone

1

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

1

Fluoroelastomer - Terpolymer

1

Perfluoroelastomer

1