I have used Bondic for a few different repairs. I works, but it doesn't "weld" the plastic. I have found that it will tend to let go with minimal force. The actual glue is strong, but didn't adhere well to the plastic. Better prep of the plastic might result in better adhesion as I didn't prep the repair by sanding to give it better grip. I just applied it to the crack and hardened it. Very likely with a proper prep, it would be more effective.