ClearX HD is an advanced polymer treatment that should be an essential part of the maintenance program for ClearPlex Invisible Windshield Protection Film. ClearX HD will maintain the scratch resistance and water repellency of ClearPlex film on your windshield when it is used as directed. ClearX HD also seals your ClearPlex film against bird droppings, bugs, oil, tar, grease, dirt, and grime. Apply a small amount of ClearX HD to your ClearPlex film at the time that the film is installed on your windshield, and every other month during the life of the ClearPlex film.