... on boards exposed under sunshine.2.UA protective(50 micron anti-UV layer,10-year quality guarantee) with an ultraviolet coextruded ... processing polycarbonate sheet Applications:1. Roofing light sheet and sunshade for office. building ,departmente,hotel,stadium,school ,amusement center ,hospital,etc ... /sheet.8. Telephone booths ,street name plates. Grade A uv-coated polycarbonate sheets for building