Do you think DOT5 will cause brake failure? DO you think NAPA or anyone else would sell you the stuff if that was even a small possibility?
There is so much BS on this fluid out there its astounding! Use it and forget about it.
And we have used it on sevedral buiilds with no issue other than one needs to bleed it a bit slower as it seems to have more off a tendency to aerate if you push the fluid through to fast. Also not a bad idea IMO to re-bleed once or twice after sitting overnight.
NO SEALANTS of any kind as the seal is made on the flare not the threads.
IF you need to flush the lines, do so with brake clean and low pressure air. Do be aware that things like calipers, master, wheel cylinders will need to be removed preferably taken apart and cleaned or replaced
