Engineering InspirationEngineering consultants specialising in braking systems, other engineered systems, specifications, component integration, safety critical systems etc.
Water Contamination of Brake Fluid

Tradition glycol based brake fluids used in most passenger cars are hygroscopic, (have an affinity for water). Water is absorbed from the atmosphere and reacts with the fluid lowering its boiling point.

Silicone based fluids (DOT 5) and minerals oils don't have this problem but water in the system has much more serious consequences where fixed displacement actuation devices such as master cylinders are used.

Engineering Inspiration have investigated a number of instances where fluid has been contaminated with water and have some solutions to prevent the entire system being stripped to remove it.