I just purchased a bottle of the new Ultima Tire and Trim Guard and I must say I'm disappointed. It goes on exterior vinyl reasonably well but the surface remains tacky even after a couple of days and I don't like that. I get much better results with Solution Plus to restore color. I use Optimum Opti-Bond Tire Gel (mixed 1:1 with distilled water) when the Solution Finish fades a bit after a few weeks to reintensify the black.
And forget about tires, UTTG II is a rather thick lotion that doesn't spread well at all, especially with a tire that has a lot of patterns (?) on it. OTOH, I can spray on some Optimum Opti-bond Tire Gel and spread it around with a rag and get a good looking low sheen result in about a minute.
UTTG II is destined to be gathering dust on my shelf for the foreseeable future . . . at least until I can find some one I don't like very much to palm it off on them.