STRENGTHENS GLASS ON A MOLECULAR LEVEL: cellhelmet Liquid Glass is a nano coating that is 500x thinner than a human hair & invisible to the naked eye. It works with all cases and accessories. SIMPLE TO APPLY ON ALL GLASS SCREENS: Simply wipe it on, let it dry and buff it off. It will then cure on / in your glass over the next 24 hours, making it stronger on a molecular level. Key Product Features UNIVERSAL SCREEN PROTECTOR: Works on all phones, watches, and Tablets with glass displays. 4 PHONES or 1 TABLET: Lots of juice in this vial. MADE IN AMERICA