It's actually the same material that your can buy at a parts store BUT the difference is that the installer has ALOT of necessary experience. I've tryed doing it myself with a couple car but it takes alot of practice, can be VERY irratating (especially if you're outside on a windy day) and the results are usually never as good or long lasting as a pro job. If one has a nicer car and/or wants it done right, one's far better off to pay a pro.