Hydraulic cylinder seals are designed to prevent hydraulic fluid from leaking out of the cylinder while keeping contaminants from entering. A typical hydraulic cylinder consists of several seals, including the rod seals, piston seals, and wear bands, each playing a critical role in maintaining optimal performance. The rod seal prevents fluid from leaking along the cylinder rod, while the piston seal ensures that pressure is maintained within the cylinder during operation. Wear bands, on the other hand, function to reduce friction and wear between moving parts.