Carlock Sealing’s Red H-PU (Hydrolysis-resistant Polyurethane) is engineered with a premium MDI-based system to specifically combat seal hardening. Unlike standard polyurethanes that degrade in moisture, our Red H-PU maintains its elasticity in water-based hydraulics. All performance claims are backed by detailed TÜV test reports, providing the technical assurance required for critical industrial projects.
- Exceptional Hydrolysis Resistance: Stable in water up to +90°C and highly resistant to steam and biodegradable hydraulic fluids (HFA/HFB/HFC).
- Anti-Hardening Technology: The specialized MDI chemical structure prevents the premature aging and brittleness common in standard elastomers.
- Superior Tensile Strength: Combines the wear resistance of polyurethane with enhanced stability in aggressive media.
- Low Compression Set: Maintains excellent sealing contact over time, even under constant thermal and mechanical stress.
Technical Disclaimer: While Red H-PU is highly resistant to hydrolysis, its compatibility with certain synthetic esters and highly aggressive chemical additives should be verified.
FAQ:
Q: Why do my green PU seals turn hard and crack?
A: Standard polyurethane often undergoes a chemical reaction called hydrolysis when exposed to water or humidity, causing it to harden and fail. Carlock Sealing recommends switching to Red H-PU to eliminate this brittle failure mode.
Q: Is MDI system polyurethane better than TDI systems?
A: Yes. MDI-based H-PU from Carlock Sealing offers better dynamic properties, higher tear resistance, and is more environmentally friendly during the manufacturing process compared to older TDI systems.
Q: Can Carlock Sealing produce custom large-diameter H-PU seals?
A: Absolutely. Our CNC turning centers can produce custom Red H-PU piston seals, rod seals, and wipers up to 4000mm in diameter with zero mold fees.
Q: How can I verify the hydrolysis resistance of Carlock Sealing's Red H-PU?
A: We provide detailed TÜV inspection and test reports upon request. These documents outline the material's performance in accelerated aging tests, proving its durability in water-based fluids and steam environments.
