Unfortunately I'm not understanding what you're asking. Do you want adhesive to "glue" together pieces of PVC moulding like Azek? If so, there is a glue for that and can be usually found near the moulding.
Or are you trying to glue something else to PVC moulding?
Thank you, I wanted something to glue the trim on the wall at the ceiling level, like crown Moulding. I needed something to hold it until I could nail it on. I asked for help in the adhesive area & was told to use fast grab premium by Loctite. It holds the trim on the wall so I can nail it, but I will check out Azek for a different project.