Aviation Oils

Castrol Brayco 599
Castrol Lubricant Oils Company Logo

Rust Preventative Concentrate


Castrol Brayco 599 is a specially designed synthetic base, dark amber, rust preventative concentrate.


Brayco 599 is designed for use as an additive for turbine engines and helicopter transmissions which use MIL-PRF23699 lubricating oil. Brayco 599 should be added to the oil sump immediately after an oil change when the equipment is intended to be placed in storage, especially in locations where high humidity and salt spray are present. This fluid should only be used for a limited time, not exceeding 25 hours. Consult the engine manufacturer’s manual to determine specific engine model recommendations and/or limitations.

Castrol Brayco 599 is used in MIL-PRF-23699 synthetic turbine oils at 10-15% by volume addition for storage. It meets the requirements of General Electric, Aircraft Engine Group Specification D50TF6-S1.

Viscosity 46 mm/s² at 40°C
Viscosity index 109
Oil type Ester
Product type Lubricating Oils
Applicable to these sectors Aerospace, Automotive Manufacture, Metals, Mining

Conditions of Use
To receive full protection for extended equipment storage, Castrol recommends addition of Castrol Brayco 599 in concentrations between 10 and 15 percent by volume. Lower concentrations, between 5 and 10 percent, may be suitable for some component storage applications depending upon storage conditions and length of storage. Consult the engine manufacturer’s maintenance manual or service bulletin to determine specific engine model dilution ratio recommendations.

Download Technical Data Sheet

Download Safety Data Sheet

Contact Us


Get a quote now

How can we help? Do you need more information? Please message us with your contact details, product name, product application and pack size / volumes required.

More info

Shop by Brand