It doesn't seem to last all that long. I rode for a few hours and I noticed that it was a little slippy compared to when I first applied it, yet still a lot better than without it. I think you would be better off with the brake spray, and better yet with a grind. And if you are doing gaps and such I really wouldn't trust the tar, at least on my rim it seems to be sort of inconsistent and slips sometimes. I'm just practicing rear wheel hops and such right now though because I'm a noob, so the tar is good enough for me at the moment. Also, thanks for the feedback on the video. I was thinking about taking it down because one of my friends said it was common sense, but I suppose I will leave it up if you guys think it will help someone.