[QUOTE 4051206, member: 43827"]I've used the same tin of copper grease for more than 25 years and it still has loads left. Always seems to work well for me.[/quote]
I kept the half-kilo tin and after about five years it had a black watery sludge on the top, so I binned it. I bought a small tube (after the Landy had gone) and it's lasted me a couple of years. A little goes a very long way.
[QUOTE 4051206, member: 43827"]Never mind the theoretical pros and cons of the stuff - has anyone had an actual experience of copper grease not doing what it's supposed to do, or causing any damage?[/QUOTE]
Always worked for me, never caused any problems. Only thing is, you get it on your hands or clothes (or on the wrong bit of the workpiece), it's very obvious as it's glittery. It doesn't seem to clean up as easily as ordinary grease.