I also have been using the dollar store gel super glue, but recently got some frags from someone that does a LOT of sps fragging and he only uses "Aquamend" Epoxy putty. I think you can get it at HomeDepot, but know for sure you can get it online between 5 and 7 bucks for 4 ounces...he claims it is much less harsh on frags that super glue. Again, I haven't tried it yet, but plan to soon