PEEK is widely used in the aerospace industry due to its high strength-to-weight ratio and resistance to harsh environmental conditions. It is commonly employed in the manufacturing of aircraft components such as brackets, seals, and insulation, where durability and performance under extreme temperatures are critical.

In the medical field, PEEK is utilized for implantable devices, including spinal fusion cages and joint replacements, because of its biocompatibility and ability to mimic the mechanical properties of bone. Its radiolucency also makes it ideal for imaging applications.

The automotive industry leverages PEEK for components like bearings, seals, and piston parts, where its wear resistance and ability to withstand high temperatures and chemical exposure enhance performance and longevity.

In electronics, PEEK is used for insulating films, connectors, and semiconductor components due to its excellent electrical insulation properties and resistance to thermal degradation.

Additionally, PEEK finds applications in the oil and gas sector for seals, gaskets, and downhole components, where it withstands corrosive environments and high pressures, ensuring reliable operation in demanding conditions.