Cracked Glass Nano Repair Fluid is designed to repair glass damage in 20 minutes! You can repair bull's-eyes, cracks, chips, cobwebs and star damage safely, easily and inexpensively. Cracked Glass Nano Repair Fluid, containing an advanced resin formula, fills cracks and prevents these imperfections from elongating or growing. Perfect for repairing any glass surface, including car windshields, smartphones, tablets, PCs and any gadgets. OUR GUARANTEE We are confident that we offer some of the best products on the market. Therefore, we provide a 30-day guarantee. We will make every effort to ensure that you are completely satisfied with your purchase. Online shopping can seem daunting. We want you to know that there is absolutely zero risk of purchasing something. We won't make it difficult if you don't love it. We offer email and ticket support 24 hours a day, 7 days a week. If you require assistance, please contact us. Please contact customer service if you have any problems with your purchase.