PU Elastomer Raw Material
For PU Seals & Gaskets
High-performance polyurethane elastomer systems for hydraulic seals, oil seals, mechanical gaskets, and dynamic sealing components. Engineered for low compression set, chemical resistance, and extended service life under pressure cycling.
PU Elastomer Materials for Sealing & Gasket Applications
Blendpolyol supplies polyurethane elastomer raw material systems for manufacturing hydraulic rod seals, piston seals, wiper seals, mechanical face gaskets, O-rings, and dynamic sealing elements for fluid-power and industrial sealing applications.
Our formulations deliver:
- Low compression set (< 25% at 70°C / 22 h per ASTM D395)
- Hydrolysis-resistant polyether systems for water-glycol hydraulic fluid
- Oil-resistant polyester systems for mineral-oil hydraulic fluid
- Extrusion resistance under high-pressure cycling (up to 35 MPa)
- Temperature range −40°C to +110°C continuous service
Typical Applications
Hydraulic Rod Seals
Dynamic sealing for hydraulic cylinder rod-end applications.
Hydraulic Piston Seals
Bidirectional sealing for double-acting hydraulic cylinders.
Wiper / Scraper Seals
Contamination exclusion for rod-end hydraulic and pneumatic systems.
Mechanical Face Gaskets
Static + dynamic sealing for industrial pumps and valves.
Custom O-Rings
Cast PU O-rings for elevated temperature and pressure applications beyond standard EPDM/NBR.
Pneumatic Seals
Lightweight elastomer seals for compressed-air actuators.
Air filter gasket — automotive + HVAC sealing
Industrial sealing strip — durable + UV stable
Typical Technical Parameters
Actual parameters customizable according to formulation design and application requirements.
Compatible Production Processes
Vacuum Casting
For precision parts requiring void-free casting.
Open Mold Casting
Suitable for large parts and simple geometries.
Centrifugal Casting
Used for cylindrical components requiring uniform density.
Automated Casting
Compatible with PU casting machines and automated dispensing.
One-Stop PU Elastomer Solution
Besides polyurethane raw materials, Blendpolyol also provides matched equipment and tooling — making us a complete production-line partner, not just a chemical supplier.
- PU elastomer casting machines (manual, semi-auto, fully-automatic)
- Metering and mixing systems (low-pressure & high-pressure)
- PU molds (steel / aluminum, custom design)
- Heating systems (drum heaters, mold heaters, oven systems)
- Complete production line solutions with engineering support
We support customers from raw material selection → equipment matching → process optimization → mass production.
Frequently Asked Questions
What pressure rating can your seal-grade elastomers handle?
Standard formulations rated to 25 MPa continuous, 35 MPa peak. For higher-pressure hydraulic applications (40+ MPa), specify reinforced or back-up-ring composite seal designs.
Can you formulate for water-glycol hydraulic fluid?
Yes. Polyether-based PU systems with anti-hydrolysis additive package — verified to ≥ 90% strength retention after 1,000 hours at 70°C in HFC fluid.
What hardness range can you provide?
We provide formulations from soft elastomer systems (Shore A 60–70) to ultra-hard industrial materials (Shore D 70–75). Specific hardness is tuned via prepolymer NCO content + chain extender ratio.
MDI vs TDI systems — which is right for me?
MDI systems provide higher load-bearing performance and lower toxicity (no free TDI vapor) — preferred for indoor casting. TDI systems offer better elasticity, rebound, and abrasion resistance — preferred for dynamic-load and high-wear applications.
Can you customize formulations?
Yes. We customize hardness, rebound, abrasion resistance, chemistry resistance, and processing characteristics. Custom formulation MOQ is typically 1,000 kg; development cycle 3–5 weeks including bench testing and customer-site trial.
Do you provide complete production solutions?
Yes. We supply raw materials, casting machines, mixing systems, custom molds, heating systems, and production line engineering support. End-to-end onboarding from formulation selection to mass production typically takes 3–4 months.
Talk to Our Elastomer Team
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