Kydex and Related

Kydex materials and supplies.

Kydex is a line of thermoplastic acrylic-polyvinyl chloride materials manufactured by Sekisui SPI. It has a wide variety of applications, including for aircraft bulkhead, firearm holsters and knife sheaths. 

It is an acrylic-polyvinyl chloride composite engineered for thermoforming fabrication, and combines properties of both the acrylic and the polyvinyl chloride components. From acrylic, it obtains rigidity and formability; from PVC, toughness, chemical resistance and good interior finish ratings. Sheet thickness ranges from .029 to .500 inches (0.74 to 12.70 mm) and can be thermoformed, post formed, brake formed and laminated.

For some applications it is used as replacement for leather, where it has the following advantages:

  • Waterproof
  • Scratch resistant (Rockwell scale "R" hardness of 90)
  • Holds its shape better, and will not stretch or shrink under normal conditions
  • Lower friction.