Skydrol™ LD-4 is a long-life, fire-resistant phosphate ester hydraulic fluid trusted globally in commercial, business, and military aircraft. Recognized as one of the most widely used aviation hydraulic fluids, Skydrol LD-4 combines exceptional thermal stability, low-density performance, and corrosion protection to ensure reliable operation in high-demand hydraulic systems.

Performance highlights include:

• Fire-resistant phosphate ester formulation, providing superior flame suppression and enhanced safety in aircraft hydraulic systems

• Extended fluid life, with improved resistance to thermal and oxidative breakdown compared to earlier Skydrol formulations

• Outstanding corrosion and wear protection, helping extend the lifespan of pumps, valves, and actuators

• Excellent low-temperature properties, ensuring smooth system response across varying flight conditions

• Approved by major aircraft OEMs worldwide, making it the standard choice for airline and MRO operations

Packaged in a 55-gallon drum, Skydrol LD-4 is ideal for aviation maintenance bases, OEM production lines, and fleet operators requiring a high-performance, long-life hydraulic fluid. Skydrol LD-4 continues to set the standard for safety, performance, and reliability in aerospace hydraulic systems.