Castrol® Aero 35 is specially designed for use in landing gear shock struts. Additionally, Castrol® Aero 35 is compatible with approved MIL-PRF-5606 and MIL-PRF-6083 hydraulic fluids. It is not completely compatible with synthetic gas turbine lubricants or with phosphate-ester hydraulic fluids. It is compatible with other petroleum-based and synthesized hydrocarbon lubricants, but contamination should be avoided in order to maintain the unique properties of Castrol® Aero 35. This product is also compatible with most seals, hoses, and paints, normally used in shock struts and dispensing equipment connected with this application. While certain grades of these materials are fully compatible with Castrol® Aero 35, it is advisable to confirm acceptability of use with either the material manufacturer or the appropriate technical support contact.