I didn't know they even put patches inside tires any more, I thought they just put a plug in the hole. When the construction boom was big in Florida, work trucks were dropping nails all over the place. It was common to pick up a nail every week, no joke. I carried one of those kits to open up the hole and put a plug in it, and I can't ever remember one of those plugs leaking.

I think I heard that radial tires need to be plugged instead of inside patched because the wire in the tire could poke back through the patch. But I don't know if that is true or not.

As for that spare tire in a can being messy, yes it is. I have dismounted tires that I used it on and it is in liquid form when you remove the tire.

Don