AQUAPEL APPLICATIONS Windshield Glass Water Rain Repellent Treatment Repels. Use the glass treatment that jet fighters use on their windshields without wiper blades! Aquapel is a patented product from the leaders in glass technology - PPG. When AQUAPEL Glass Treatment is applied to the exterior of vehicle glass, it leaves the surface water resistant. Rain beads up and rolls off, dramatically improving visibility-day and night. One application lasts up to six months-six times longer than other products. This product applies to the windshield to dramatically increasevisibility in rain day or night. The solution forms a chemical bond with glass, unlike silicone-based products that simply coat glass. It lasts up to 6 times longer than other products. The solution causes the rain to bead up and roll off. Also, snow, ice, and bugs are easy to remove. One application treats one windshield or two side windows.