CRL One Gallon Concentrated Glass Cleaner is the most popular glass cleaner for in-shop and on-the-job use. It's easy-to-use and leaves no film or smears on glass. Does not harm paint. Used for cleaning glass by insulating glass unit manufacturers, and also used by the auto glass industry for windshields. It's easy to mix - 1 gl. makes 10 gls. of strong, safe cleaning fluid. For extra hard cleaning jobs, use it with less water. It is also available in 55 gallon drums for industrial users. We recommend the use of CRL Lint-Free Wipes with any glass cleaner.