OK
--In a ****quick fix ****if the flare is just having a problem seating against the face of the nipple fitting and unless the flare itself is not split or chipped--wiping some blue paste on & around the **face** NOT threads of the nipple fitting usually stops the leak----------I've had to make ***temporary repairs*** in a pinch ------Replacing a worn flare fitting is the proper procedure for a permanent repair--------save teflon for the faucet. ......