Its for a mold, and the reason I tried 5200 is that it was thick and filled the gaps nicely.

The PVC cement is very thin, and the PVC bond weld (2 part) stuff peels off when you pull off the part.

I've had pretty good results with PVC pipe for round parts, and Azek for flat parts, but I want to do a flat with a round, so I need to "weld" pvc pipe to azek(pvc board)

Bill