Elastomer

Rating

Natural Rubber, Isoprene

4

Butadiene Styrene, Butadiene

4

Butyl

2

Ethylene Propylene

1

Nitrile

4

HNBR

---

Epichlorohydrin

---

Polychloroprene

1

Chlorosulfonated Polyethylene

3

Chlorinated Polyethylene

---

Urethane

2

Polyacrylate

---

Polysulfide

2

Silicone

2

Ethylene acrylic elastomers

---

Fluorosilicone

4

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

4

Fluoroelastomer - Terpolymer

4

Perfluoroelastomer

1