As far as the "sealant" part of it...it seems to me that it would simply temporarily prevent rapid tire deflation AT SPEED, because the gel would coagulate into the hole each time it passed around that part of the tire/tube. But if you stopped it would still go flat. Anyway to me that would just be an added benefit. I found this when I got online to search for a motorcycle tire balancer because I got tired of dealers not balancing (when I pay for it and specifically tell them to do it and they promise to do it!!!), or improperly balancing, my motorcycle tires.