Cars, boats, airplanes, vinyl shutters....I've used 303 for ~25 years with excellent results. I even did an informal test using 2 rubber bungees left outside. The 303 coated one did appear better over a year.
That’s amazing to me because in my opinion VLR has an incredibly strong scent. You might want to try Carpro Perl diluted, it has no scent from what I can tell and outlasts even 303.