Tempered glass is a single pane that has been heat-treated to increase strength and shatter into small, relatively harmless fragments; it classifies under 700711 for vehicular use. Laminated glass consists of two or more glass plies bonded with an interlayer (typically polyvinyl butyral) so that it holds together when broken; vehicular laminated glass classifies under 700721. Windshields are almost always laminated; side and rear windows are typically tempered, though some modern vehicles use laminated side glass.

Yes. Safety glass from China may be subject to Section 301 additional duties. Importers should verify the applicable tariff line and current Section 301 list, as well as check whether any antidumping or countervailing duty orders cover the specific product and origin, before calculating landed cost.