PEEK Seal Rings

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PEEK Seal Material Offers Robust Advantages for Hostile, High Temp Environments

PEEK seal rings are typically used in hostile, high temperature environments where other materials cannot effectively withstand such conditions.

Check out PEEK seal material properties, benefits, applications and configuration possibilities below to find out if PEEK seal rings are right for your application.

PEEK Seal Material Properties

PEEK seal material is made from a high-grade thermoplastic polymer that’s known for its excellent mechanical and corrosion resistant properties, which are able to be maintained even at high temperatures.

It also has excellent thermal degradation resistance, and is able to withstand both organic and aqueous environments.

Compared to most thermoplastic materials, PEEK melts at a relatively high temperature (typically around 649 degrees Fahrenheit). At operating service temperatures, PPEK is capable of withstanding temperatures up to 480 degrees Fahrenheit.

Because PEEK is so robust, it’s considered to be a high-end engineering plastic.


PEEK seals are known for their ability to enhance product performance by extending service life, as well as providing increased load capacity and higher RPM in dynamic applications over a wide range of environmental conditions.

In summary, the benefits of PEEK seals include:

  • High Temperature Tolerance
  • Corrosion Resistant
  • Thermal Degradation Resistant
  • Chemical Resistant
  • Withstands Organic & Aqueous Environments


PEEK seal rings are used for pistons, bearings, pumps & valves. It is also one of the very few materials that can be used in ultra-high vacuum applications.

PEEK seal rings are commonly found in the following industries:

  • Automotive
  • Aerospace
  • Oil & Gas
  • Military
  • Medical
  • Chemical


As a global leader among hydraulic seal and piston ring manufacturers, Grover Corp provides PEEK seals and rings in a wide variety of configurations, including:

Piston Ring Configurations

  • Side Pin Piston Rings
  • Oil Control Piston Rings
  • Butt Taper Face Piston Rings
  • Angle Cut Piston Rings (Butt Cut)

Sealing Ring Configurations

  • Butt Cut Sealing Rings
  • ONEP Sealing Rings
  • Inseal Sealing Rings
  • Step Seal Sealing Rings
  • Step Lock Sealing Rings
  • Lok Seal Sealing Rings
  • Angle Step Cut Sealing Rings
  • Hook Sealing Rings
  • Angle Cut Sealing Rings
  • Step Cut Sealing Rings
  • Permaseal Sealing Rings
Contact Grover Corp online now for questions about PEEK seals, or for project assistance; we’ll respond shortly!