My tire went flat and my moped is my only form of transportation. I'm going to get a new tube, but I don't have time to wait for it and have to get to work today. The can of sealant I got says don't use it on vehicles with less than 4 wheel. I don't know why that would be a problem as I know NOTHING about tire repair, but has anyone here ever used this stuff in a pinch? Thanks!