Elastomer

Rating

Natural Rubber, Isoprene

2

Butadiene Styrene, Butadiene

2

Butyl

2

Ethylene Propylene

2

Nitrile

1

HNBR

---

Epichlorohydrin

---

Polychloroprene

2

Chlorosulfonated Polyethylene

2

Chlorinated Polyethylene

---

Urethane

---

Polyacrylate

---

Polysulfide

3

Silicone

2

Ethylene acrylic elastomers

---

Fluorosilicone

---

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

1

Fluoroelastomer - Terpolymer

1

Perfluoroelastomer

1