Skydrol™ LD-4 is a premium fire-resistant phosphate ester hydraulic fluid formulated for aircraft hydraulic systems requiring superior performance, stability, and safety. Part of the renowned Skydrol LD Series, this fluid delivers long service life, excellent corrosion protection, and outstanding thermal stability, making it one of the most trusted choices in the aviation industry.

Performance highlights include:

• Fire-resistant phosphate ester formulation, offering unmatched safety in high-pressure hydraulic systems

• Extended fluid life, resisting oxidation and thermal degradation to reduce maintenance costs

• Excellent corrosion and wear protection, helping extend the life of hydraulic pumps, valves, and actuators

• Superior cleanliness and deposit control, ensuring smooth operation of sensitive aircraft components

• Approved by all major aircraft OEMs, meeting stringent aviation and MIL-SPEC standards

Packaged in a 5-gallon pail, this size is ideal for aviation MRO facilities, fleet maintenance crews, and aerospace service centers that require reliable, bulk hydraulic fluid in a manageable container. Skydrol LD-4 ensures maximum performance, safety, and durability in critical aircraft hydraulic systems.