Elastomer

Rating

Natural Rubber, Isoprene

1

Butadiene Styrene, Butadiene

1

Butyl

1

Ethylene Propylene

1

Nitrile

2

HNBR

4

Epichlorohydrin

---

Polychloroprene

2

Chlorosulfonated Polyethylene

2

Chlorinated Polyethylene

---

Urethane

4

Polyacrylate

---

Polysulfide

4

Silicone

3

Ethylene acrylic elastomers

---

Fluorosilicone

4

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

4

Fluoroelastomer - Terpolymer

4

Perfluoroelastomer

1