It's a fantastic question Eggman. It actually struck me as odd, thinking about it as in my almost 20 years in the tire industry, I have never heard anyone mention "protectants" of any sort. I worked on a research team specifically looking at Ozone Cracking and not once was a protectant like this even discussed. I have to believe that the answer is ultimately no, or that it may help marginally but not measurably?
I will be at SEMA next week and will ask some questions and see what I can find out.