Elastomer

Rating

Natural Rubber, Isoprene

1

Butadiene Styrene, Butadiene

2

Butyl

2

Ethylene Propylene

2

Nitrile

2

HNBR

2

Epichlorohydrin

---

Polychloroprene

2

Chlorosulfonated Polyethylene

2

Chlorinated Polyethylene

1

Urethane

4

Polyacrylate

4

Polysulfide

---

Silicone

---

Ethylene acrylic elastomers

---

Fluorosilicone

1

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

1

Fluoroelastomer - Terpolymer

1

Perfluoroelastomer

1