Yes, you can repair a cracked mop bucket. First, clean the bucket thoroughly to remove any dirt or debris. Dry it completely. For small cracks, use a waterproof adhesive or sealant, such as silicone caulk or epoxy resin. Apply the adhesive along the crack, pressing it in to ensure it fills the gap. Allow it to cure as per the manufacturer's instructions.
For larger cracks, consider using a plastic welding kit. Heat the area around the crack with the welding tool, then apply a plastic filler rod to the crack, melting it into place. Smooth it out with the tool to ensure a strong bond. Alternatively, you can use a fiberglass repair kit. Cut a piece of fiberglass cloth to cover the crack, apply resin over the crack, place the cloth on top, and then apply more resin. Allow it to cure fully.
For a temporary fix, use duct tape or waterproof tape to cover the crack, but this may not hold up under heavy use. Always test the repair by filling the bucket with water to ensure it no longer leaks. If the repair doesn't hold, consider replacing the bucket, as continued leaks can lead to further damage or safety hazards.