Is it safe to mix water with some types of brake fluid?

Mixing water with brake fluid is not safe and can significantly compromise braking performance and system integrity. Brake fluid is designed to perform under high thermal and mechanical stress, and it is engineered to be hydrophobic, meaning it doesn't mix with water. When water is introduced into the braking system, it can lead to several issues such as reducing the fluid's boiling point, which can result in vapor lock. This can cause a loss of brake pressure, leading to potentially dangerous situations where the brakes may fail to engage properly.

Additionally, the presence of water can promote corrosion within the brake lines and other components, degrading the overall function and lifespan of the braking system. Therefore, it is crucial to maintain the proper fluid properties to ensure efficient and reliable brake performance.