I use similar coatings at work in an industrial setting. Couple of things to note:
1) the performance of the coating is HIGHLY dependent on how you lay it down. You have to be careful about putting down THIN layers or it won't work.
2) it's not UV safe, meaning anything that gets sun exposure will degrade quickly. I'd be the poster above talking about gym shoes saw the coating degrade because of walking around in the sun as much as from being laid down on a flexible substrate.