Polyurethane Gasket
Polyurethane gasket (also known as a PU gasket or urethane gasket) is a precision-engineered sealing component made from high-performance polyurethane elastomer — a durable, flexible material that bridges the gap between rubber and plastic. Designed to seal, cushion, and isolate components in industrial and mechanical systems, it prevents fluid leaks, absorbs vibration, and protects equipment from wear, impact, and chemical exposure. Polyurethane gaskets maintain excellent elasticity and dimensional stability even under continuous pressure or harsh environmental conditions, ensuring long-lasting and reliable performance.
High-Performance Industrial Polyurethane Gasket
Key Features & Advantages of Polyurethane Gaskets
- High abrasion & tear resistance;
- Wide temperature / chemical resilience;
- Custom hardness (Shore A) & dimensions;
- Long service life under load & vibration;
- Replacement alternative for rubber/plastic seals;
- OEM grade: custom tooling, minimal downtime.
Application of Polyurethane Gaskets
- Hydraulic and pneumatic systems;
- Aerospace, automotive, marine sealing;
- Mining and heavy equipment machinery;
- OEM manufacturing lines, conveyors, pumps;
- Chemical process pipelines and fluid control systems.
Custom Industrial Polyurethane Gakets Solutions
- Product Specifications
- Gallery
Design & Dimensional Options of PU Gasekts
| Specification | Range / Customization | Description |
| Outer Diameter (OD) | 10 mm – 1000 mm (customizable) | Sized to match flange, housing, or assembly requirements |
| Inner Diameter (ID) | As per shaft, pipe, or sealing groove | Precision fit for effective sealing or isolation |
| Thickness | 0.5 mm – 50 mm or customized | Adjustable thickness to balance compression and flexibility |
| Tolerance | ±0.05 mm to ±0.2 mm | Tight dimensional accuracy for high-performance applications |
| Shape & Type | Flat, ring, lip, or profile-cut | Designed per drawing, 3D model, or engineering sample |
| Surface Finish | Smooth, matte, or textured | Available to optimize sealing performance and assembly ease |
| Color Options | Yellow, red, green, black, transparent, or customized | For visual identification or branding purposes |
| Manufacturing Process | Cast or Molded Polyurethane | Selection based on production volume, size, and performance requirements |
Polyurethane Gasket Specifications
| Property / Parameter | Typical Range / Value | Performance Description |
| Hardness (Shore A) | 60–98 | Adjustable hardness range for optimal sealing pressure, cushioning, or vibration control |
| Tensile Strength | 8–55 MPa | Withstands high tensile and shear loads in static and dynamic sealing applications |
| Elongation at Break | 400%–650% | High elasticity ensures flexibility and recovery under repeated compression or flexing |
| Tear Strength | 35–155 kN/m | Strong resistance to tearing and edge damage during installation or use |
| Compression Set (22h × 70°C) | <10% | Maintains sealing integrity and dimensional stability under continuous compression |
| Density | 1.20–1.28 g/cm³ | Consistent mechanical behavior under pressure, temperature, and chemical exposure |
| Elastic Impact Recovery | >25% | Absorbs mechanical shock and vibration while maintaining tight sealing contact |
| Abrasion Resistance | <0.05 cm³ / 1.61 km (Akron Test) | Exceptional wear resistance in dynamic or abrasive environments |
| Operating Temperature Range | -40°C to +120°C | Reliable sealing performance in extreme temperatures and industrial environments |
| Chemical Resistance | Excellent | Resistant to oils, fuels, ozone, solvents, and many industrial chemicals |
| Electrical Properties | Good dielectric strength | Suitable for applications requiring electrical insulation and mechanical protection |
| Water & Fluid Resistance | Excellent | Prevents leakage and maintains performance in hydraulic, pneumatic, and fluid systems |
Related Products
Why Choose Lisen Urethane Gasekts ?
As a specialized manufacturer of polyurethane and urethane components, Lisen provides end-to-end gasket solutions — from custom-molded and cast polyurethane gaskets to standard production runs. Our engineering team supports customers through every stage, including material selection, design optimization, rapid prototyping, and precision molding to ensure consistent quality in demanding industrial environments.
Whether you need custom polyurethane gaskets, PU sealing components, or industrial-grade urethane gaskets, Lisen delivers solutions that improve sealing reliability, reduce downtime, and extend equipment lifespan.
Contact our engineers today to discuss your application, request a quote, or develop a tailored polyurethane gasket solution that meets your exact performance requirements.
Polyurethane offers higher tensile and abrasion resistance, excellent compression recovery, and strong load-bearing capability, so gaskets last longer in abrasive or high-wear environments. Compared with silicone, polyurethane typically delivers superior wear resistance though silicone can outperform PU at extreme high temperatures.
Yes — many polyurethane formulations resist oils, fuels, greases and common industrial chemicals, which makes them suitable for hydraulic, pneumatic and fluid-handling systems. However, select the proper formulation when exposure to aggressive solvents (esters, ketones, strong acids) is expected.
Common production methods include cast (urethane casting) for low-to-medium runs and complex geometries, injection or compression molding for high volumes and tight tolerances, and cut gasket sheet/rolls for simple or large flat gaskets. Choose cast for toughness and low-volume parts, molded for repeatability and high volumes, and sheet for quick cut-to-size needs.
Yes. Some PU grades are formulated and processed to meet FDA or food-contact standards, but you must request certified formulations and traceability; not all PU grades are food-safe by default.
Typical uses include hydraulic & pneumatic systems, pumps and valves, conveyors, OEM machine housings, mining and heavy equipment, and any application requiring abrasion-resistant sealing or cushioning. PU gaskets are especially common where wear and mechanical load exceed rubber’s capability.