Polysulfone (PSU) is a rigid, high-strength tough transparent thermoplastic that offers good heat resistance for continuous use up to 300°F (149°C). It is resistant to oxidation and hydrolysis and withstands prolonged exposure to high temperatures and repeated sterilization.  Polysulfone is also highly resistant to degradation by gamma or electron beam radiation.  Electrical properties are stable over a wide temperature range and after immersion in water or exposure to high humidity. 

Polysulfone excels in many fluid-handling applications and has successfully replaced brass in pressurized hot water applications for over 20 years. It exhibits low creep under a sustained load at elevated temperatures and can withstand continuous exposure to hot chlorinated water.

Key Features

  • Acid, Alkali, Alcohol, Hydrocarbon resistant
  • HDT of 174°C (345°F)
  • Good creep resistance
  • Good dimensional stability
  • Excellent hydrolytic stability
  • Transparent
  • Colorable

Typical Applications

  • Faucet components
  • Hot water fittings
  • Plumbing manifolds
  • Medical devices
  • Semiconductor manufacturing
  • Food service


Our extruded stock shapes of the following grades provide a wide range of performance options for demanding applications:

Unfilled Polysulfone:

  • Udel P1700 (Natural, Black)

Glass reinforced Polysulfone:

  • 10% Glass Fiber reinforced: Udel GF110 (Natural, Black)

Please contact us to discuss custom PSU grade or color not listed above. 
APEXCO-PPSI uses prime virgin resins. All products are fully traceable back to raw material lot.

Note: Ultem, Lexan and Noryl are registered trademarks of SABIC Innovative Plastics.
Udel and Radel are regusted trademarks of Solvay Advanced Polymers.