Elastomer

Rating

Natural Rubber, Isoprene

2

Butadiene Styrene, Butadiene

2

Butyl

1

Ethylene Propylene

1

Nitrile

2

HNBR

2

Epichlorohydrin

1

Polychloroprene

2

Chlorosulfonated Polyethylene

2

Chlorinated Polyethylene

---

Urethane

1

Polyacrylate

2

Polysulfide

4

Silicone

1

Ethylene acrylic elastomers

---

Fluorosilicone

2

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

1

Fluoroelastomer - Terpolymer

1

Perfluoroelastomer

1