Elastomer

Rating

Natural Rubber, Isoprene

4

Butadiene Styrene, Butadiene

4

Butyl

2

Ethylene Propylene

2

Nitrile

4

HNBR

4

Epichlorohydrin

---

Polychloroprene

4

Chlorosulfonated Polyethylene

4

Chlorinated Polyethylene

---

Urethane

---

Polyacrylate

---

Polysulfide

---

Silicone

---

Ethylene acrylic elastomers

---

Fluorosilicone

2

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

1

Fluoroelastomer - Terpolymer

1

Perfluoroelastomer

1