I'm a part of FSAE at my college and the brakes were leaking on one of our old cars at the master cylinder and the brake line and at the master cylinder and the reservoir. Another kid proceeds to wrap the treads with Teflon tape multiple times making thickly. I told him thats not how you use it but to no avail. He also thought that we didn't need to bleed the front brakes (we use 2 master cylinders, 1 for front and 1 for rear). We took the car out and drove it the next day. The first guy that drove it said the brakes were "soft". Thankfully they didn't fail and it was a 5 year old car so not too big of a deal I guess.