Windshield repair needs skill and care. Even then, a small risk stays. A repaired crack can spread in rare cases. The chance stays low—around 0.1% to 1%. Because of this, we do not offer a lifetime warranty on crack repairs. But we do give a lifetime warranty on all chip repairs. Keep your receipt with you. We need it to confirm your repair. Without a receipt, we cannot give warranty service. When a chip fixed by us spreads into a crack, we fix that crack for free. We never add extra or hidden charges. If we cannot stop the crack, we refund the full amount shown on your receipt.