If you are gluing PVC plumbing pipes, we recommend:
If you are gluing something else and your joint needs to be flexible use:
- PVC Adhesive
- Household Goop
- LePage's 5 Minute Epoxy
- LePage's Regular Minute Epoxy
- Most other epoxies will work for this application also.
There are so many kinds of plastic its hard to give advice here that applies to them all.
If possible try a small test in an area that doesn't show.
Some plastics have a smooth surface finish that can be sanded off with a 120 grit sand paper, for better adhering properties.