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SKYDROL LD-4 Chemical compatibility with O-rings, rubbers, & plastics

Skydrol LD-4 is a high-performance, fire-resistant hydraulic fluid designed for use in aerospace applications. It is formulated with advanced phosphate ester base fluids and additives to provide excellent thermal stability, oxidation resistance, and anti-wear properties. Skydrol LD-4 helps to ensure smooth and efficient operation of hydraulic systems in aircraft by maintaining optimal viscosity and lubrication performance under extreme conditions. It offers superior protection against rust and corrosion, extending the life of hydraulic components and systems. Skydrol LD-4 is widely used in commercial and military aircraft, providing reliable performance in high-pressure and high-temperature hydraulic systems. Its advanced formulation helps to reduce maintenance requirements and improve overall system reliability. Proper handling and storage are essential to maintain its quality and performance. Skydrol LD-4 is also compatible with various seals and materials, making it a versatile and effective hydraulic fluid for a wide range of aerospace applications.

Need SKYDROL LD-4 resistant plastics, O-rings, rubbers, and seals? Get in touch now!


Canyon Components strives to meet all customer service requests. If you need something that isn't listed below, feel free to contact a Canyon Components product and application consultant and let our knowledgeable staff help you design the perfect part for your needs.

Paint covered o-ring
MaterialPerformanceGet a quote
FFKM (CanRez™, Kalrez®, Chemraz®)Excellent: <15% SwellingGet a quote
FKM ETP (Viton® Extreme)Excellent: <15% SwellingGet a quote
FKM (Viton®)Not Recommended: Over 40% SwellingGet a quote
NBR (Buna-N, Nitrile)Not Recommended: Over 40% SwellingGet a quote
HNBR (Hydrogenated Nitrile)Not Recommended: Over 40% SwellingGet a quote
EPDM (Ethylene Propylene)Excellent: <15% SwellingGet a quote
Aflas® (TFE/P, FEPM)--- Insufficient Testing DataGet a quote
Silicone (VMQ, PVMQ)Poor: 25-40% SwellingGet a quote
Fluorosilicone (FVMQ)Poor: 25-40% SwellingGet a quote
Polyurethane (PU, AU)Not Recommended: Over 40% SwellingGet a quote
Teflon® (PTFE)--- Insufficient Testing DataGet a quote
Neoprene (Chloroprene)Not Recommended: Over 40% SwellingGet a quote
SBR (Styrene-Butadiene)Not Recommended: Over 40% SwellingGet a quote
ACM (Acrylic Rubber)Not Recommended: Over 40% SwellingGet a quote
Butyl (IIR, Isobutylene Isoprene)Acceptable: <15-25% SwellingGet a quote
Butadiene Rubber (BR)Not Recommended: Over 40% SwellingGet a quote
Isoprene Rubber (Polyisoprene)Not Recommended: Over 40% SwellingGet a quote
Natural Rubber (NR)Not Recommended: Over 40% SwellingGet a quote
Hypalon (CSPE)Not Recommended: Over 40% SwellingGet a quote
Metal Piston

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