I bought some 30 minute epoxy a few weeks before we moved, and upon opening it and attempting to use it, the stuff was very gritty when squeezing it out of the bottle. The hardener was normal. The bottom portion of the epoxy in the bottle was like a gel too. It may be that we got some of the same run of product. I bought some devcon epoxy at one of the big box stores, and used it without an issue.

Bill, Waco Brother #1