O-Ring, Kalrez® 4079, #229. Kalrez® 4079 perfluoroelastomer combines the elastomeric properties of Viton with the chemical resistance of PTFE, making it the best possible o-ring material available. Kalrez® 4079 should be considered for service in high temperature, corrosive environments such as:
  • Polar Solvents such as Ketones, Esters and Ethers
  • Strong Organic Solvents such as Tetrahydrofuran, Benzene, Dimethylformamide and Perchloroethylene
  • Acids such as Hydrochloric, Nitric and Sulfuric
  • Strong Oxidizing Agents such as Dinitrogen Tetroxide and Fuming Nitric Acid
  • Metal Halogen Compounds such as Titanium Tetrachloride and Diethylaluminum Chloride
  • Hot Mercury and Caustic Soda
  • Chlorine-Wet and Dry
  • Inorganic Salt Solutions
  • Fuels such as JP-5, Aviation gas and Kerosene Kalrez® 4079 exhibits exceptional thermal stability and is serviceable at long-term temperatures to 316ºC and intermittent temperatures to 343ºC. Kalrez® 4079 is not recommended for use in sealing applications below -5ºC. For complete chemical resistance and fluid compatibility, see chart in the front of this catalog. Made in the United States.