Rod wiper seals keep hydraulic fluid clean by preventing contaminants, such as dirt, mud, and water, from entering the cylinder and damaging rod and buffer seals. Contaminated hydraulic fluid can damage machine surfaces and clog filters, shortening the lifespan of the hydraulic cylinder. These ring-shaped wiper seals (sometimes called wiper rings, excluders, scrapers, or dust seals) have a lip inside the cylinder that keeps the wiper in place. They are used in industrial tools, mobile hydraulics, and agricultural applications.