Engineered for reliable rod and piston sealing in standard hydraulic cylinder applications, this Buna-N Homogeneous U-Seal delivers consistent performance across a wide range of industrial fluids and operating conditions. The homogeneous construction — molded from a single compound throughout — eliminates fabric or reinforcement layers, providing uniform flexibility and a clean sealing lip profile ideal for low-to-medium pressure systems.
Key Benefits
Homogeneous construction — single-compound molding ensures uniform flexibility and consistent lip contact across the full seal cross-section
Excellent fluid compatibility — Buna-N (NBR) compound resists petroleum-based hydraulic fluids, mineral oils, and water-based fluids
Self-energizing U-lip profile — system pressure activates the seal lips for a positive, leak-resistant seal under load
Cost-effective performance — ideal for standard-duty hydraulic cylinders where urethane or PTFE compounds are not required
Wide size availability — stocked in a full range of standard rod and bore dimensions
Typical Applications
Standard-duty hydraulic cylinders (industrial and mobile)
Agricultural and light construction equipment
Material handling and lift systems
OEM and MRO replacement sealing
Pneumatic and low-pressure hydraulic circuits
Material Properties
Compound: Buna-N (NBR)
Hardness: 70–80 Shore A
Temperature Range: -40°F to +250°F (-40°C to +121°C)
