Fluid film rust treatment

I used Woolwax on my new RAM in 2020. Did it myself using their sprayer an some spray cans. Dropped spare and removed rocker plugs to spray in there. So far so good. Stays on well. Did not have to re-apply this year but will before next winter.
I have seen some videos where they say it will encapsulate and stop further rust. Going to try on my wife's 12 Grand Cherokee in the spring. Good product.