How To Stop Windshield Crack From Growing. There are a couple of methods auto owners can try to stop or slow the spread of a windshield crack. The diy kits vary in the size of chip or crack that they can repair, so read the package information carefully.
Before you attempt to fill the crack, clean the windshield with auto glass cleaner and paper towels. As a temporary fix for an emergency, you can use glue to fill the nooks and crannies of your small windshield chips and cracks. Dirt can make repairs more difficult, while water can cause the crack to grow.
Park it in a garage or under a shade, as too much heat can make the crack grow.
Alternately, apply a thin layer of clear fingernail polish over the crack to provide a temporary fix. Once it dries, secure the nail polish with a clean layer of transparent tape. How to stop a crack in a windshield from spreading? You should replace it just like you'd change the oil or rotate the tires, albeit less often.