Our car windshield crack repair solution contains water， resin， and silicon nitride. It can efficiently clean the windshield of the car， reduce the damage of foreign bodies to the body surface， and maintain the window. The way to use it is simple: first. Put a drop of resin on the crack， and then apply a curing film， and then scrape off the bubbles with a blade， and then put the vehicle in the sun for 10-30 minutes， or replace it with a UV lamp， until the vehicle is cured， and finally tear off the curing film and scrape off the excess resin. After use， it can help to quickly remove stubborn stains， oil film， insect stains， water stains on the surface of the glass， improve the transmittance of the glass and ensure clear vision. Please kindly note:🚚 Fast ShippingThis product ships from our U.S. warehouse via UPS (FedEx as backup). We aim to deliver your order quickly and reliably. 📦 No Return AcceptedThis is a single-use consumable product. Once opened and applied, it cannot be returned, reused, or restocked. Therefore, we do not accept returns under any circumstances. 🔍 Order CarefullyPlease read the product description thoroughly before purchase. Make sure it fits your intended use. We recommend placing orders cautiously. 💰 Promotional OfferThis product is currently on promotion at near cost price, with special deals for bulk purchases. Please check the promotion details on the listing page to save more.