SB Augustamax - cascade auto glass A windscreen is developed with 2 layers of glass separated by a layer of PVB that performs numerous functions; it glues the layers together and also bonds them, it reinforces the glass in the event of a break (compeling it fall apart rather than shatter right into huge harmful shards) as well as it minimizes UV exposure. Mon, 06 Aug 2018 06:26:00 UTC en