Mineral oil

JUICE-LUBES Mineral OIL is a high performance, fully synthetic brake fluid with an extremely high boiling point point. Thus, your braking will remain homogeneous even during the longest downhill runs.
It is compatible for use in mineral oil brake systems only.
DO NOT USE IN PETROLEUM BASED SYSTEMS.
USE
Always consult your brake manufacturer's instructions before attempting a fluid change. If you are not sure you can do this correctly, consult a qualified mechanic.
Brake fluid is not a substitute for worn pads or damaged hardware - always check this before riding.