A Piston Seal is used to prevent fluid from leaking past the piston in a hydraulic cylinder. It is made of a soft material, such as rubber, and is designed to conform to the surface of the piston. The main function of a piston seal in a hydraulic cylinder is to prevent fluid from leaking past the piston. Attributes:• Manufactured with rubber which gives excellent corrosion resistance• Manufactured to precise specifications and are built for durability, reliabilityApplications:A Piston Seal allows the cylinder to generate force and move smoothly. Manufactured with rubber which gives excellent corrosion resistance.