PU Seals Explained: Types, Where Polyurethane Seals Are Used and How to Specify Them
Polyurethane seals are the default in most hydraulic and pneumatic cylinders, but a PU seal chosen on the name alone can wear, extrude or harden early. This guide covers the main types, where they are used, how to specify hardness and profile, and how to read a failed seal.













































