I shared this on another forum and thought I'd share it with my PC family.
I bought a tire repair kit that I hope never to use. But if I get a clean flat like from a nail, I hope not to take the tire off the rig, making the repair on-vehicle by using the common sticky rope plugs. I did such a tire repair once many years ago on my old motor home and it worked out beautifully. But I didn't have a compressor with me in those days so I made the repair at a gas station and used their air pump. Today with this kit I can do it anywhere, for myself or for a fellow camper in need.
This is the kit I bought at Walmart maybe 4 years ago. They don't sell this exact kit any longer, but something very similar offered from the same "slime" company. The pictures make it look real big, but it is a very compact, easy to store in a PC.
I hate using the liquid "slime" itself. I removed it and tossed it. I recommend using just the rope plug. Once repaired, go to a tire shop and get it patched better via a "from the inside" patch for great long term reliability. The rope patch from the outside works good, but done from the inside with an adhesive patch with-plug from that direction is better.