Wiper Seals Manufacturers, Suppliers & Exporters In India. Wiper seals, also known as scraper seals or dust seals, are components used in hydraulic and pneumatic systems to prevent contaminants such as dirt, dust, and moisture from entering the system. They are typically installed on the external side of a cylinder, and their primary function is to wipe off or scrape away foreign particles from the rod as it retracts into the cylinder. Wiper seals are often used in conjunction with rod seals and piston seals to provide comprehensive protection against contamination. Proper compatibility and coordination between these seals contribute to the overall effectiveness of the sealing system.