Elastomer

Rating

Natural Rubber, Isoprene

1

Butadiene Styrene, Butadiene

1

Butyl

1

Ethylene Propylene

1

Nitrile

2

HNBR

---

Epichlorohydrin

---

Polychloroprene

1

Chlorosulfonated Polyethylene

---

Chlorinated Polyethylene

---

Urethane

---

Polyacrylate

---

Polysulfide

---

Silicone

---

Ethylene acrylic elastomers

---

Fluorosilicone

---

Tetrafluoroethylene/Propylene

---

Fluoroelastomer - Dipolymer

4

Fluoroelastomer - Terpolymer

4

Perfluoroelastomer

2