 Now, the best way to fix a wall or a ceiling crack is to use a strong perforated drywall tape. This type of tape has large squares. It looks almost like netting, and it's tacky. It's a little bit sticky. So you first bridge the gap of the crack with this tape, and then you want to smooth on a fairly thin amount of spackle or mud over the wall or ceiling crack. And once that area is dry, it can be sanded, and then you're going to probably end up putting on about two more very thin coats,