Elastomer

Rating

Natural Rubber, Isoprene

4

Butadiene Styrene, Butadiene

3

Butyl

4

Ethylene Propylene

4

Nitrile

2

HNBR

---

Epichlorohydrin

---

Polychloroprene

3

Chlorosulfonated Polyethylene

1

Chlorinated Polyethylene

---

Urethane

---

Polyacrylate

---

Polysulfide

2

Silicone

4

Ethylene acrylic elastomers

---

Fluorosilicone

---

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

2

Fluoroelastomer - Terpolymer

2

Perfluoroelastomer

2