Safelite Autoglass Practice Test

Windshields are designed to keep occupants safe and maintain the cabin’s integrity during a crash. Laminated glass achieves this because it consists of two layers of glass with a plastic interlayer (often polyvinyl butyral) in between. If the windshield is hit, the outer layer may crack, but the interlayer holds the pieces together, preventing large shards from flying into the cabin. This barrier helps protect occupants, supports the roof structure, and provides a stable surface for airbag deployment. Other glass types either break into sharp fragments or lack the interlayer that keeps shards from penetrating the interior, so they aren’t used for windshields.