Elastomer

Rating

Natural Rubber, Isoprene

3

Butadiene Styrene, Butadiene

2

Butyl

2

Ethylene Propylene

2

Nitrile

4

HNBR

---

Epichlorohydrin

---

Polychloroprene

4

Chlorosulfonated Polyethylene

4

Chlorinated Polyethylene

---

Urethane

---

Polyacrylate

4

Polysulfide

4

Silicone

---

Ethylene acrylic elastomers

---

Fluorosilicone

1

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

1

Fluoroelastomer - Terpolymer

1

Perfluoroelastomer

1