Welcome, Guest. Please login or register.Did you miss your activation email?
There are alloys that melt in boiling water, not sure if they adhere to copper though. I've got a chunk, have yet to find a good use for it after 20 years.Soldering seems like a sort of black magic to me. Filling a gap without it running out remains a mystery. I just finished hooking up my heat exchangers and out of a dozen joints 4 leaked. It only happens when it's copper to brass. Copper to copper seems foolproof.
Blue Monster makes a compression seal tape I saw on the shelf at the supply house a couple months ago. Never tried it myself, but the guy at the counter said it works well and the label was pretty encouraging as well. Those copper to brass joints can be troublesome sometimes, the best I've found is to clean and flux the heck out of the "face" of the brass cup (perpendicular to the pipe) as it's quite a bit thicker than the cup on a copper fitting and tough to feed solder into otherwise. I've had my fair share of leaks over the years and it's kind of a crapshoot on getting those to seal without taking the joint apart. Is this in a position that you are able to disassemble the joint without cutting?