Elastomer

Rating

Natural Rubber, Isoprene

4

Butadiene Styrene, Butadiene

4

Butyl

3

Ethylene Propylene

3

Nitrile

2

HNBR

---

Epichlorohydrin

---

Polychloroprene

3

Chlorosulfonated Polyethylene

2

Chlorinated Polyethylene

---

Urethane

2

Polyacrylate

---

Polysulfide

1

Silicone

3

Ethylene acrylic elastomers

---

Fluorosilicone

---

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

2

Fluoroelastomer - Terpolymer

2

Perfluoroelastomer

2