Skydrol LD-4
Skydrol LD-4 has low density, excellent thermal stability, prevention of Valve erosion and sediment control. Erosion resistance is made possible by a breakthrough anti-erosion additive and acid cleaner contained in the formulation. At the time of its release, it was a groundbreaking product that solved the problems of Valve erosion and thermal stability common in earlier liquids. There have been no changes to the formulation for over 35 years, giving LD-4 a reputation as the gold standard among leading aerospace Hydraulic Type IV fluids.