Also, I use electrical because it's not see through(dunno if the plants damaged area likes light or not, but I know it's fine in dark), and it's not as sticky as some others i.e. duct tape, masking tape, etc...
I've seen alot of reconstruction on plants where they take a stem, cut it off halfway, and make a little bandage out of plastic wrap and soil. LIke you'd have the soil wrapped around the wound, and plastic wrap keeping it in place. Never tried this though, so no real say on it. But I hear it gets the job done.