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.

For that reason, many companies will happily waive the deductible if the existing windshield can be repaired. So you may be able to have that chip or crack fixed without paying anything at all.
If your vehicle really needs a automobile windshield chip repair, make sure to get high quality glass. Have it installed properly and choose a good adhesive because it is essential in windshield installation.
Do-it-yourself repairs are the cheapest option but if not done correctly, it may cost you more. If you plan to do it yourself, it is important to choose the best kits. Research or seek the advice of experts so you would not be sorry. There are two types of windshield repair kits. The first is the less expensive syringe-type. The kit includes a syringe and the resin, intended for one-time use only. It contains just enough resin to repair one chip. The second type is the more expensive bridge system that includes the resin's and a plastic bridge. This type can be used several times because it is refillable.
If the crack looks exactly the same when completed, it's very likely the technician didn't inject the resin properly. A properly completed repair with cause each area of the damage to disappear from at least from one angle of vision (ex: looking from one side, looking from below, looking from above, etc.).
One way to find out about a companies reputation is to call other repair techs and ask them which company they bought their repair kit from and are they satisfied with it. Call the company itself and ask to speak to the owner. You will get a good feel for the company after having spoken with the customer service people and the owner.