Shimano Hydraulic Mineral Oil

This oil is specifically formulated for Shimano hydraulic systems. Using it in brake systems from other manufacturers may void your warranty or cause seal damage, so it is best to stick to the fluid recommended by your brake manufacturer.

Low-viscosity oil flows more easily through the narrow channels of your brake lines, which leads to faster, more consistent lever response. This is particularly important for maintaining braking performance during long, intense descents where heat buildup can affect fluid behavior.

No, this is a mineral-based oil, which does not absorb atmospheric moisture. This means it is more stable over time and helps prevent internal corrosion, though you should still follow your manufacturer's recommended service intervals for bleeding your brakes.

Yes, this mineral oil is non-toxic and non-corrosive, making it safer to handle than traditional DOT brake fluids. However, you should still wear gloves and eye protection to keep your skin and eyes safe from any potential irritation.

Check the reservoir cap on your brake lever; Shimano systems will explicitly state 'Mineral Oil Only.' Never mix mineral oil and DOT fluid, as doing so will destroy the seals in your braking system and cause immediate failure.