A professional plumber would cringe at what I've done. Epoxy putty is another quick fix for a leak in copper pipes.
When a copper pipe corrodes and leaks or bursts from freezing, you have to fix it fast. If the leak is pinhole-sized and less ...
If you’ve ever dealt with pinhole leaks in copper pipes ... leak is small and actively dripping, wrap the pipe with plumber’s tape or a pipe repair clamp as a temporary solution.