Just some new info. I was browsing through my new Grainger catalog came across the following. One could probably order it via Grainger.com. Kopr Shield (copper based) 1/2 # can PN 3LP03 1.0 # can PN 3LP02 Alum Shield (zinc based, prob. like Noalox) 8 oz can PN 3LN47 Phil, KB9CRY