Originally Posted by staleg
Do you use thread lock on some of the brake fittings?
For example the inside end of the thru frame fittings. There are no flare, just plain 1/8" NPT threads.
Every brake like fitting requires a flare, if the fittings you have wont accept a flare you have the wrong fittings. Brake lines DO NOT rely on the threads to seal.
Brake lines DO NOT require thread sealant, it is the flare that seals the line not the threads