We have come up with DHS Wiper Seal that is round. It is made with polyurethane material and thus is highly flexible. This is mainly for multiple applications in industrial usage. Wiper seals maintain sealing contact to the piston rod, whilst the rod seal establishes the tolerance for the rod diameter d. The retracting piston rod could introduce impurities into the cylinder in the absence of a wiper seal. To prevent particles or moisture from entering the exterior of the wiper seal, the outer static sealing of the DHS Wiper Seal within the housing is also crucial.