The difference is amazing! Aquapel Glass Treatment makes it easier to clear ice, snow, and dirt from the windshield because the glass is completely sealed. Aquapel Glass Treatment reduces the glare from headlights and streetlights in the rain, particularly at night. Aquapel Glass Treatment even helps reduce water marks and protects glass from salt water. Use it on your boat windows and windshield, in RVs, and on shower doors.