That's a common and frustrating problem! A cracked outdoor trash can doesn't necessarily mean it's time for a costly replacement. With the right method, you can often get several more seasons out of it. The best repair method depends on the size and location of the crack.
For small to medium cracks, a high-quality plastic epoxy or a specialized plastic repair adhesive is your best bet. Clean the area thoroughly with soapy water and let it dry completely. Sand the area around the crack lightly to create a rough surface for better adhesion. Apply the epoxy according to the instructions, often from a two-part syringe, and press the crack closed. You can reinforce it with a fiberglass mesh patch on the inside for added strength. Let it cure fully before using the bin again.
For larger cracks or splits, plastic welding is a more permanent solution. This involves using a soldering iron or a dedicated plastic welder to melt the plastic on both sides of the crack, fusing it back together. You can use a spare piece of similar plastic (like from a milk jug) as filler rod. This method creates a very strong bond but requires careful technique to avoid burning through the plastic.
For quick, temporary fixes on non-structural areas, heavy-duty waterproof tape or a flexible sealant can work. However, for a lasting repair on a bin that gets moved and knocked around, epoxy or welding is strongly recommended. Always wear gloves and work in a well-ventilated area. A proper repair not only saves you money but also keeps waste and pests securely contained.