Now this product will require you to trim the automobile windshield chip repair area and then sand around the area about to out with a heavier grit sandpaper like a grit this gives it something to bite too. Trim down into the foam a little to, so that you make like a little groove for the compound to lay in.

Snow and ice: It is important to remove frost, snow, and ice as soon as possible. These elements greatly damage and weaken your windshield. Turn on your cars defroster and use a snow brush or ice scraper. Be gentle with the ice scraper as it too can damage the windshield.
Some would ask, "Repair or replace?" Considering the pricey cost of automobile windshield chip repair, one would rather choose a rock chip repair kit. This specific line of kit is widely available in shops online and local and if you want to try the benefits of having them, shop around and get one for yourself and for your auto's need.
One more repair that can set you behind financially if you don't get done right away is windshield repair. A lot of times our windshields get cracks or chips from road debris that kicks up on the road. If the damaged windshield is taken in for repair promptly, it can be repaired. However if you wait too long you will have to end up buying and replacement windshield and paying to have it installed which is much more costly than a simply repair. Also some shops will offer a mobile service where they will come to you to repair your windshield.
Jolt your car or windows. Try to avoid slamming doors or shutting doors with the windows all the way up. Creating extra pressure inside the vehicle in this way can cause the crack to spread.
Take the time to ask questions from the auto glass worker who will be performing the work. Or, ask management if the worker is unavailable. You have the right to know the quality of the auto glass being used. Understand any charges you need to pay as well as what the insurance company allows for windshield replacement. Being well informed saves you money even when it comes to windshields.