CarPro CeriGlass is a special glass polish developed from the innovative optical polishing compound, Cerium Oxide. This remarkable formula removes hard water spots that are attached on the glass like scales! Your vehicle's windshield and windows will have like-new clarity and smoothness after polishing with CeriGlass. This kit includes: 150 ml. Ceriglass, 1 foam applicator , 1 microfiber towel. *CarPro products being mistaken as expired is a common misconception with CarPro products. On the bottle is a sticker with a Pr and an arrow pointing to the date. The Pr stands for Production date. This is not an expiration date.* Will not distort glass Great for restoring old windshields For hand or machine use Not for use on aftermarket window tint, painted or coated glass Great for polishing Plexiglas and restoring headlights