Kalrez®(FFKM) – Perfluoroelastomer

Benefits: The best combination of chemical and high temperature resistance of any elastomer Excellent resistance to petroleum-based fluid, polar solvents, acid, steam and the majority chemical that attack other elastomers.
FDA approval for pharmaceuticals and food processing

Temperature: -29 to +327 °C
Limitations: Limited at low temperature and inferior resistance to fluorinated solvents

FKM – Fluoroelastomer (Viton )

Benefits: Outstanding resistance to high heat
Excellent resistance to oil, gasoline, hydraulic fluids and hydrocarbon solvents
Very good resistance to weather, oxygen, ozone, and sunlight; good flame retardance.

Temperature: -40 to +260 °C
Limitations: Poor resistance to ether, ketone, amine and chlorosulfonic acid

NBR – Nitrile Rubber

Benefits: Superior resistance to petroleum-based hydraulic fluids, good resistance to hydrocarbon solvents, very good resistance to alkalis and solvents.
Temperature: -57 to +120 °C
Limitations: Inferior resistance to ozone, sunlight, weathering and poor resistance to polar solvents and strong acid

EPDM – Ethylene Propylene

Benefits: Excellent resistance to ozone, water and steam, alkalis and acids, salt solutions and oxygenated solvents.
Temperature: -57 to +150 °C
Limitations: Poor resistance to oil, gasoline, and hydrogenated solvents.

VQM – Silicone

Benefits: Outstanding resistance to high heat and excellent flexibility at low temperatures; low compression set
Excellent resistance to weather, ozone, sunlight, and oxidation

Temperature: -101 to +260 °C

Limitations: Poor mechanical properties
Inferior resistance to oil, gasoline, and solvents
Poor resistance to alkalis and acids.