Rod Twin Lip Seal U-Cup is an asymmetrical design cup seal for use in hydraulic applications. The RTU twin lip seal design offers increased seal stability and superior sealing ability. Our Rod Twin Lip U-Cup is an asymmetric seal offering superlative dry rod sealing for light and medium duty applications. RTU is our industry standard rod seal due to its twin lip profile and consistent performance. Produced from a High Performance Urethane compound, the twin lip rod seal offers extremely low compression set and excellent extrusion resistance.