Prevent Windshield Crack From Spreading ((install)) Page

Glass expands with heat and contracts with cold. A temperature differential across the windshield creates internal stress. For example, using a hot defroster on a freezing windshield can cause a crack to grow inches in seconds.

Slamming car doors creates a sudden burst of air pressure inside the cabin that can cause a crack to "pop" and spread instantly. 2. Control the Temperature prevent windshield crack from spreading

If you're unable to get professional help immediately, here are some temporary fixes to help prevent a windshield crack from spreading: Glass expands with heat and contracts with cold

Dirt and moisture are enemies of a stable crack. prevent windshield crack from spreading