C4 utilises a covalent or chemical bond to become an extension of the plastic molecule it's protecting. This means that you now have a protective coating of unparalleled durability. Unlike many trim products on the market, C4 is an exceptionally thin (circa 30nm) optically clear film which means that it does not add an unattractive gloss film to the surface but instead restores all but the most faded trim to an as new condition.  You can expect up to 2 years durability from a single application.