The PPF is mainly composed of three layers of materials. The first layer is 0.5mils polyurethane transparent film, elastic polymer used to eliminate dust adhesion, pollution and surface scratch: the main function is an antifouling coating.
Why can PPF repair itself? It is due to the most superficial coating structure. Because the molecular structure of the most surface coating is very close, and the molecular density is also high, thus forming what we often call high density coating.