Improves wet weather visibility through the windshield and windows Use on glass and plastic. An application of Rain View to glass and plastic (polycarbonate or acrylic) makes the surface so slick that rain and water literally slides off, greatly improving visibility. For use on all automotive and RV windows and windshields, boat windscreens and windows, running lights, headlights. tail lights and any other surfaces where rain can impact visibility. One application should last several months.