The Meguiars G8408EU Perfect Clarity Glass Polishing Compound safely removes bonded contaminants such as pollution, wiper marks, oily residue and water spots that normal glass cleaners leave behind. It is the perfect preparation before applying the Meguiars G8504 Perfect Clarity Glass Sealant. For best results, work the glass compound with a Meguiars X3080EU Even Coat Applicator Pad before removing the product and cleaning the glass with a clean Meguiars X2020EU Supreme Shine Microfiber Towel.