With the Stoner Invisible Glass Windshield Chip Repair Kit you can easily repair chips, stars, and dings in your windshield and prevent the damage from spreading. The Stoner Invisible Glass Windshield Chip Repair Kit saves you the time and expense of windshield replacement. You can do it yourself in just minutes without mixing. The Stoner Invisible Glass Windshield Chip Repair Kit cures in sunlight. This patented repair method evacuates air and fills the cavity with UV cured resin that clears and bonds the loose glass, preventing further damage. Each kit does one repair. It is not recommended for cracks or damage over 1¼ inches long.