Hi, Dar, You don't say what you're trying to glue, but I have grown
pretty fond of E6000. It is thick and gooey, but it can be
compressed to very thin if needed, and bonds dissimilar materials
very strongly. It has a fairly long working time, and remains a bit
flexible. In my tests, it was the only candidate that cemented
titanium to silver even under stress and shear pressure. It's great
as a backing for opals or other non-flat cabs.
I look forward to other replies! My husband has accused me of fixing
everything with silicon or epoxy, but its not a fair statement-- I
also use super glue (especially Zap-a-Gap, which I also use for
first aid) and E6000!