It adds an optically clear sacrificial layer to the exterior of the windshield to help reduce direct exposure of the original glass to small stones, road debris and everyday wear.
A quality film is designed for optical clarity when properly installed and maintained.
No protective film can guarantee that glass will never chip or crack. Its purpose is to add an additional sacrificial layer between common road exposure and the windshield.
Longevity varies with driving conditions, mileage, exposure and the specific film used. Because it is sacrificial, it can be replaced when wear or damage warrants it.
