I will say absolutely it does not. It dries into the rubber like clearcoat covers paint. I"ve had some mutli-year treatments, you don't see any cracking, etc. Sure, it gets a little duller as time goes by but the tires have looked good enough I've not retreated the same tires. It says you can easily retreat them, never saw the need - but that was my personal taste. They just never got to look bad as tires typically do. I do hand wash my vehicles (point is a carwash doesn't put stuff on my tires). Had a Kia Optima with a 5+ year run with it and the tires really just looked new at that point (no shine just clean). That was probably about 35k miles wise.