Glass Sealant is a long-lasting glass treatment that increases water repellency causing water to instantly bead off. For use on windshields, car windows and mirrors, house windows, sinks, tiles, shower doors and any glass surface. Glass Sealant repels rain for improved clarity while driving; makes it easier to remove sap, dirt, ice and snow for a self-cleaning effect; reduces glare; and helps reduce hard water marks. Unlike silicone-based treatments that offer short term protection and can alter optics, Glass Sealant works by forming a high strength, temperature-resistant, invisible and permanent SI matrix chemical bond. It isn't affected by glass cleaners, windshield washer fluids or anti-freeze and can protect up to six months under normal driving conditions.