IG Glass Stripper prepares your glass for rain-repellent or semi-peranent coatings. Effectively strip your windshield of silicone, waxes, oils, tar, tree sap, road salt, and road grime to prepare glass for productive product application. Removes water spots and baked-on hard water mineral deposits. Professional Results - restores glass to its original condition. Note, will not remove "etched-in" water spots.