PERFECT TOOL: Professional quality Do-It-Yourself windshield cracks/chips repairs with no mixing required, windshield repair kit can quickly and effectively repair small cracks chips only in 20-30 minutes. Save your time and money to prevents damage from spreading Restores windshield to near new condition. Long-lasting maintenance effect.WIDELY USE: Car Windshield Repair Kit is designed for most types of outer glass small damaged by double layer laminated windshield glass. The kit works best on small chips, bulls-eye, spider web, star-shaped, Half-moon crescents, crack not more than 12 inches/ 30 cm and round damage not more than one inch in diameter.(Tip: Not work for cellphone screen.))EASY to OPERATE: The method of repairing slight glass cracks is to clean and dry the glass surface before construction and then squeeze the resin into the cracks of the cracks or bullets, then put on the curing strip, then quickly dry and solidify under ultraviolet light 5-10 mins. It is to scrape off the residual resin with a spatula.ADVANCED FORMULA: Imported repair fluid (this is the key), the shear strength can reach to 20PA, the repair location will not be broken even though glass break. Enhanced injection plastic injection molding head, can produce a strong pressure to push the repair liquid into cracks.