Elastomer

Rating

Natural Rubber, Isoprene

4

Butadiene Styrene, Butadiene

4

Butyl

1

Ethylene Propylene

1

Nitrile

4

HNBR

1

Epichlorohydrin

2

Polychloroprene

2

Chlorosulfonated Polyethylene

2

Chlorinated Polyethylene

---

Urethane

---

Polyacrylate

4

Polysulfide

1

Silicone

3

Ethylene acrylic elastomers

---

Fluorosilicone

3

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

4

Fluoroelastomer - Terpolymer

3

Perfluoroelastomer

1