Skydrol™ 500B-4 is a premium phosphate ester-based, fire-resistant hydraulic fluid designed for commercial, military, and aerospace hydraulic systems. As one of the most trusted fluids in aviation maintenance, it delivers exceptional thermal stability, corrosion resistance, and low-temperature performance, ensuring reliable operation under the most demanding flight conditions.

Performance highlights include:

• Fire-resistant phosphate ester formulation for maximum safety and flame suppression in high-pressure hydraulic systems

• Outstanding thermal and oxidative stability, minimizing fluid breakdown and reducing maintenance intervals

• Superior corrosion and wear protection, extending the lifespan of valves, pumps, and actuators

• Low-temperature fluidity, ensuring smooth performance across a wide operating range

• Approved by major aircraft manufacturers, making it a leading choice for global fleets and MRO operations

Packaged in a 55-gallon drum, this size is perfect for aviation maintenance bases, OEMs, and fleet operators requiring a reliable bulk supply. Skydrol 500B-4 offers proven safety, performance, and longevity for next-generation and legacy aircraft systems alike.