FPE Seals offer a wide range of hydraulic wipers in High Performance Hallite® 361 polyurethane, Nitrile®, Hythane® 181 and other polyester based materials, along with press-fit metal caged ranges. Wipers are installed in the sealing configurations of hydraulic cylinders to prevent contaminants such as dirt, dust and moisture from entering the cylinder as they retract back into the system.