went to one today where. at one time or another there was leak lock put on the where the piston is at in the ah. needless to say there is a restriction in the indoor coil and i could not blow it out with nitrogen.
And damn leak lock was so tight i twisted the dam copper trying to break it loose f***.
I agree, but certain applications call for something a little more heavy duty. Had a couple of maytag service valves leak profusely ( they were wrenched, over heated during brazing or both). Slapped some 567 on em, sealed right up. Plus I don't believe it hardens or cures like leak lock