Throughout this site we use many technical terms, and given the breadth of readership our site enjoys, sometimes we are remiss and incorrectly assume everyone knows what we are referring to. For those that do not, here are some explanations of the technical terms use.
The fluid used in hydraulic brake systems. It has no corrosive effect on rubber and has a high boiling point. Brake fluid has an affinity for water which, after a period usually reckoned to be 18 months, results in its becoming contaminated and needing replacement.