Cryogenic Corks, Plugs and Rods

PFI is a world leader in machining rigid foam plugs for cryogenic applications. PFI owns custom-built machines that make machine foam plugs or corks in a variety of sizes. Plugs and corks form part of a cryogenic tank or Dewar. PFI fabricates and machines rigid foam rods from 1 inch to 6 inches in diameter, and machine rigid foam plugs or corks as large as 92 inches and tolerances of .010 inch

Currently, PFI manufactures more than 50% of all the plugs and corks in the United States. PFI also has international clients.

The company works with many distinct types of rigid foam, each having a diverse set of properties. PFI offers foam that can hold temperatures from -320°F to +350°F. PFI can select materials to meet customer requirements for various qualities.

As the Vice President of one of PFI’s long standing clients, a major cryogenics equipment manufacturer, told us:

“Nobody can touch PFI’s capabilities in fabricating cryogenic corks and plugs. They have been a true partner with us since 1971.”

PFI also machines acrylic rods for aircraft drive shafts used for hydraulic fluid distribution.


  • PVC Foams
  • Acrylics
  • Styrene
  • Urethanes


  • Thermal-insulating foam corks & plugs
  • Medical/food grade application
  • Acrylic rods for aircraft drive shafts


  • Artificial Insemination
  • Pharmaceutical Labs
  • Food Industry
  • Metal handling and treatment
  • Liquid gas
  • Medical labs
  • Dermatology
  • Culture transport
  • Stem cell research
  • NASA/Space research
  • Aircraft maintenance parts