Salient performance/Quality assurance:
1. Perfluoro (ether) rubber is invented by DuPont, DuPont is creator of it
2. Kalrez is the only product which the time of application is more than 30 years, it is proved a long-term reliable and secure product in a variety of harsh sealing conditions
3. Kalrez is the only product which from rubber to finished product all controled by DuPont,so ensures that the long-term stability of using of each product .
4. Traceability: Each individually wrapped, has a unique bar code, every single product can be traced back to any information
5. High temperature, high pressure. The maximum temperature can reach 327 ºC heat resistance
6. Chemical property is stable, resistance to hydrogen sulfide, benzene, oil, strong acid and alkali, the kinds of chemical medium are more than 1600.
7. Excellent tensile strength (TS~15-20MPa)
8. Extremely low compression permanent deformation(~20%-70h 200ºC)
9. Excellent sustained sealing ability
The type of Kalrez O-RING:
Japanese Industrial Standard: JIS (P/G/V/S/NW)
American National Standards Institute: AS-568A
European standard : K
Audited Supplier 
){kind=link}