Kalrez® 4079 perfluroelastomer 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, Bensene, 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.