Kalrez® 1050LF General Purpose FFKM

kalrez 1050LFDuPont™ Kalrez® 1050LF perfluoroelastomer parts are a carbon black-filled general-purpose product for o-rings, seals, and other parts used in chemical process industries. It is a classic-grade and longtime favorite for premium performance and provides a more economical option than similar compounds such as 7375.

Kalrez 1050LF o-rings can maintain their recovery with elasticity following high-pressure applications, maintaining a tighter seal for longer periods of time compared to other compounds. With a pressure rating of 1,500 PSI, it can help extend seal life and integrity, ultimately lowering costs.

With above-average hot water and steam resistance, the maximum application temperature for 1050LF is approximately 550°F (up to 288°C). This compound is also known for its excellent amine resistance and compression set properties. It has a Shore A durometer of 82.

In addition, Kalrez 1050LF has excellent chemical resistance, with the ability to withstand contact of over 1,800 different chemicals, plasmas, and solvents.

In particular, this compound stands out for wet applications in semiconductor manufacturing – stripping and copper plating, which include:

  • Door/lid seals
  • Drain seals
  • Seals for chemical containers
  • Fittings
  • Seals for filters/connectors
  • Flow meters

This reliable compound from DuPont is classified as a general usage product. It is not recommended for use in organic or inorganic acids as high temperatures and is not recommended for applications that require rapid temperature cycling properties.


For more information about Kalrez 1050LF, or to see if it is a good fit for your application, contact Gallagher Fluid Seals today.

Gallagher Fluid Seals is an authorized distributor for DuPont™ Kalrez®.