Elastomer

Rating

Natural Rubber, Isoprene

2

Butadiene Styrene, Butadiene

2

Butyl

1

Ethylene Propylene

2

Nitrile

1

HNBR

2

Epichlorohydrin

---

Polychloroprene

1

Chlorosulfonated Polyethylene

1

Chlorinated Polyethylene

---

Urethane

---

Polyacrylate

---

Polysulfide

1

Silicone

---

Ethylene acrylic elastomers

---

Fluorosilicone

---

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

4

Fluoroelastomer - Terpolymer

4

Perfluoroelastomer

2