You might also email JB weld asking them.
The number JB Weld states "most plastic", but not all.
And sand paper it up for a good hold.
It seems this kind you used wasn't working correctly as it should have got a "hold" in a minute or so, not 30 minutes.
New to FW fish? First tank in a long time or EVER??? Need some info on keeping fish?
Start here - Aquarium Advice Article
FW Favorites right now Clown Loaches, any shrimp - SW Vase Red Mangroves