You’ve probably read about self-healing characteristics of many paint protection films. Video demos show miraculous results when certain PPFs are exposed to heat. But the science behind self-healing is not the stuff of comic books. It’s real and has revolutionized the industry of paint protection film.
Real World Chemistry
Paint protection films are fabricated from urethane polymers. Self healing polymers activate in response to an external stimulus (temperature change, light). The almost instantaneous removal of minor scratches from many PPFs is due to a chemical top coating on the film. It reacts to heat (hot water, heat guns, etc.). The exact characteristics involved in self healing paint protection films is fascinating, especially if you are a bit of a chemistry geek.