Our Windshield Crack Repair Kit contains Nano Titanium Oxide, Mineral Oil, Surfactant. Its use is simple: put a drop of resin on the crack, cover it with a curing film, scrape off the bubble with a blade, move the vehicle to direct sunlight for 10-30 minutes or change the UV lamp until curing, and finally tear off the curing film and scrape off the excess resin.