How to do it
Step by step
- Identify the plastic if you can — waxy PP/PE bins resist most glues.
- Wash, dry, and scuff the crack area with sandpaper.
- Mix 2-part plastic epoxy and work it into and across the crack.
- Back the inside with mesh or a strip of plastic for strength.
- Cure fully before filling the bin with anything heavy.
Conditions
When the answer changes
If the bin is polypropylene (recycling code 5), even plastic epoxy is a maybe — a specialty primer or a soldering-iron weld works better. A bin that flexes in use wants a flexible repair, not rigid epoxy.