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.

I have seen this procedure first hand and walked away shaking my head wondering why anyone would want to do this to their windshield. Plus, if you haven't had a new windshield in a while it becomes pitted and is very difficult to see in the sun light or at night. If you have picked up a crack, more than likely it's been hit many times already and is probably pitted.
You get a chip on your windshield in less than a second. The most common cause is flying rocks. A crack can happen just as quickly as a chip. You never know when that small little chip is going to turn into a crack that completely hinders your view while you are driving. You may not know this but your windshield provides up to 30 percent of the structural strength of the vehicle. If your windshield is not strong then it affects the entire car. Driving over one bump in the road or a pothole can turn your chip into a crack which will mean you need more than just a repair, you will need professional auto windshield repair.
When I first started my windshield repair business I was excited beyond belief. I was going to make $500 per day and finally live life on my terms. I'd be "CAPTAIN WINDSHIELD REPAIR," blazing a trail through my area, leaving all the other windshield repair businesses in my dust. Was I ever wrong.
Learn how to perform basic maintenance on your vehicle. It is very easy to do a tune up or change your oil so there really is no reason to bring your car to an auto repair shop to have these things done. Instead, just watch tutorials online to learn what you need to do it on your own.
Not all chips and cracks can be repaired when windshield damage occurs. It is definitely worth the time to have any damage evaluated by a professional to avoid further cracking and damage and eventual replacement.