There are two main factors which separate residential films from automotive films. The first is adhesive. Most of our residential films have a water-activated adhesive, which means it is not sticky to the touch, and you use the mounting solution to activate it during installation. The automotive adhesive is sticky to the touch, making it more aggressive for automotive applications. The second factor is the functionality and construction of the product. All of our films are constructed for optimal performance for what they are intended to be used for. We do not recommend that you mix and match films (i.e., automotive film on residential or vice versa).