The StopnGo plug kit I mentioned earlier is a little bit different from most. It uses a mushroom shaped rubber plug that's installed using a gun like tool. The tool looks like a small calking gun.

The plug is inserted into the tool and there's a part of the tool that is inserted into the hole in the tire, you pull on a handle which forces the plug thru a metal tube and then into the tire, the larger part of the mushroom shape is now on the inside of the tire casing, you pull it outwards to seat it against the casing of the tire. When you inflate the tire, the plug is held tight by air pressure.

No glue, you use a tiny bit of oil to help insert the plug.

They work very well, I've installed them and then ridden on the patched tire for hundreds of miles while on a long trip.

The best way to fully repair involved taking the tire off the rim and using either another type of plug or a patch on the inside of the casing, that's what I do when I'm not sitting on the side of the road with a flat, I use the plug tool to get me off the road or onto my next destination.

Ditto on the full sized spare, on my car I have to use one, it messes up the all wheel drive if you use a different sized tire.