Polyurethane seals are seals made of polyurethane raw materials. They are mainly used in hydraulic and pneumatic systems. They are easy to install and good at removing dust from the piston rod. Hydraulic pu seal is the most commonly used seals in medium and high-pressure hydraulic cylinders. TYS is a hydraulic PU seals manufacturer that provides different types of polyurethane seals, including PU piston seals, PU rod seals and PU wiper seals.