Don----bad on you. Should never use teflon tape on brake lines. The seal does not happen at the threaded interface. The seal happens as a result of the flared section of brake line being forced onto a mating cone in the fitting which the brakeline is being attached to. All the thread does is provide a mechanical force to hold the male cone on the fitting and the female flare on the brakeline together under high pressure. I would suggest that either you used a flaring tool with the wrong angle, or used incorrect fittings.-----there should never ever be fluid getting past the flared area to the threaded area.