Any of these stone chips can be repaired. Beyond looking for these types of common chips, it is important to take into consideration the size of the damage. If the damage cannot be covered by a half dollar, the chip is too large to be repaired. Another important piece of information to consider is the acute area. The acute area is the area of the automobile windshield chip repair directly in the drivers line of vision. It is the same size as a piece of paper being held horizontally in front of the driver. In this area, the National Glass Association does not recommend a repair being done unless it is no greater than .95 of an inch. An easier way to imagine this is that a quarter should be able to cover the entire area of damage in the acute area.

The windshield was designed to protect you. The dings and cracks may have come from something that could fly toward you and hit you. It protects you from outside intruders and it helps in the event of a car accident. It is actually designed as the number one safety restraint system in your vehicle. It actually provides up to 60 percent roof-crush-protection in the event that there is an accident where your car flips over. Also, it takes care of backstop support for the passenger side airbag in a front-end accident. This means that the airbag stays in place as a passenger hits it using the windshield to hold it there. So you are protected from being crushed or thrown from the vehicle with the windshield.
Warranties may not seem important, but they really are when it comes to windshields and windshield repair. A reputable company will certainly stand behind their work and have no problem guaranteeing that work. Any future incident could be the result of work that was not done well and you want to make sure that you have a recourse that will not have additional costs.
Use your defroster on high. Extremes in temperature are never a good thing for a cracked or damaged windshield. If you live in an area where you are required to use your defroster regularly, gently warm up the car over a period of time. It's also best to find a mobile windshield repair company that can do your repairs as soon as possible.
BUT if they hesitate or ask questions, and more often than not, they will call you back and say, Hey wait a minute, come back (IMPORTANT FOR YOU TO APPEAR TO WALK AWAY. IT IMPLIES, NO PRESSURE, AND PEOPLE DO NOT LIKE TO BE PRESSURED OR SOLD).
To further strengthen the windshield, the auto glass is subjected to a tempering phase. The sheet is heated to a temperature of 1565 degrees Fahrenheit or 850 degrees Celsius. It is then subjected to blasts of cold air. A piece of PVB plastic is sandwiched between two pieces of auto glass. The sandwich is heated inside an autoclave. This bonds the components together tightly and removes any trapped air.