A windshield chip repair is performed by clearing out air and fragments from the damaged areas then injecting a clear resin to fill the space. When totally filled, the resin is cured by an ultraviolet light, strengthening the bond and stopping the crack from breaking further. This process only works on the layered glass like windshields. The resin is inserted between the windshields two layers and it keeps the glass safe from further damage.
Most windshield chip repairs will be successful if the damage is smaller than a standard business card. A rock chip repair won’t make the point of impact invisible, but it will improve your visibility by 60% to 80%. You cannot compare two different windshield chip repairs, they are all different. Lots of variables need to be taken into account when deciding whether a repair will work, such as its type, its size, the amount of debris and its position. If the windshield’s upper layer is intact then a windshield chip repair will not necessarily work.