Your experience with the tire inflator goop is exactly what happened to me when I blew a tire on my Volt. What happened (or happens, perhaps, since it's a common occurrence apparently) is that a little bit of the goop dries out at the hose connection point in the bottle, and that's the first bit of goop to go through the tube, and it clogs the tire valve immediately and prevents any goop from actually going into the tire. And, just as you described, upon removing the hose, it explodes everywhere. Utterly worthless. In my case, it of course happened on the first out-of-state trip I took the Volt on, and it wrecked my vacation schedule. I had to spend the night in a little rural town and wait for a new tire at Walmart the next morning - Sunday. I was lucky they had it, or I would have spent two days in that little town. I will never own a car again that has no spare. Otherwise, as others have suggested, you buy a spare wheel and tire that fits the car and carry it in the back when you need it. The "repair kits" save the car makers money, so they will continue to spread to all new cars in the future.