The standard process for repairing a window, used by both professional window repair technicians and non-professionals, is injecting resin into the crack or chip, as of 2015. Several different window repair kits are available with the tools necessary to inject resin into the window, as well as instructions on the process. If it isn't possible to inject resin into the window, it is usually necessary to replace it.
Window repair kits tend to be less expensive than a professional window repair. However, if the driver doesn't repair the window correctly, it can cause more damage and require a more expensive repair.
Before repairing a window, the window must be dry and at room temperature. If the window has any water on it, the repair can trap the water. One way to quickly dry the window is with a blow dryer.
Exact instructions vary depending on the window repair kit and the type of damage. For cracks, the standard procedure involves applying resin to the entire crack, and then putting curing strips over the entire crack. The driver then leaves the car in the sun for about 10 minutes so the resin dries, and then removes the strips.
For chips, the standard procedure involves setting up the resin collector above the impact point and inserting drops of resin into the collector. After turning a pressure device to insert the resin into the crack, the driver removes the collector and adds curing strips to the chip. The driver then follows the same drying process.