Kalrez® Performance Information
DuPont™ Kalrez® perfluoroelastomer parts last longer and seal more effectively than other elastomers due to their exceptional chemical resistance. Kalrez® parts can withstand attack by more than 1,800 chemicals, including many acids and amines that cause other elastomers to fail due to excessive swelling.
Kalrez® parts have exceptional heat resistance, even after long-term exposure to temperatures up to 327°C. Kalrez® retains its elasticity and recovery properties better than other high-temperature elastomers. There are many Kalrez® products developed for specific processing environments.
Kalrez® Heat Resistance
DuPont™ Kalrez® perfluoroelastomer parts last longer and seal more effectively than other elastomers due to their exceptional thermal stability. Longer-lasting seals can be a direct route to extended mean time between replacement and lower cost of ownership.
Thermal Stability
Even after long-term exposure to temperatures up to 327°C, Kalrez® retains its elasticity and recovery properties better than other high temperature elastomers.
It resists hardening and embrittlement, the principle heat-related cause of seal degradation and failure. In high-vacuum semiconductor applications, Kalrez® parts exhibit negligible outgassing over a wide range of temperatures.
Low Compression Set
Kalrez® parts exhibit low compression set, maintaining their elastic recovery to maintain tight seals over the long haul. Because Kalrez® parts recover better under compression than other perfluoroelastomers, they maintain their shape better under prolonged stress.
Kalrez® Chemical Resistance
DuPont™ Kalrez® perfluoroelastomer parts are available in a number of different compounds that are formulated to optimize properties and give the best possible performance in various chemicals and temperatures.
Modification of the finished properties is achieved by use of fillers and other additives to enhance their performance. When using Kalrez® parts, it is important to consider all factors such as process chemicals, process temperatures, and seal design.
Before considering a compound, please contact us or see Dupont™’s Chemical Resistance Guide and Kalrez® Application Guide for more information. Sample parts are generally available for immersion tests.
