There are various products on the market and this is the kit which has resided in my bike pack for many years
Hmmmm..... must be getting on for 10 years old
The kit consists of 2 CO2 cylinders and a right-angled fitting (nice touch ,that), a reamer for cleaning the hole, some sticky rope which I think are called dog turds in some quarters (chihuahua-sized, one presumes) and an awl to drive the turds into the puncture. I'll admit that the presence of the kit has given a certain peace of mind over the years, but not without a couple of nagging doubts. A piece of sticky rope blocking a hole with 40psi or thereabouts of tyre pressure behind it, plus added centrifugal force when moving doesn't fill me with confidence, even taking it easy. Secondly, 2 CO2 cartridges are highly unlikely to deliver full pressure to a tyre - maybe enough to limp to the nearest gas station pump, maybe not.
In the end, the worry about inflation got the better of me. I popped down to the local store and bought an inflator which plugs into a cigarette lighter port. As the case was large and the working internals are small, I simply removed the case and now have a pump which is less than 12 cm down its longest side. Chop the plug off and fit crocodile clips to attach to the bike battery and you have a compact and lightweight inflator. Here 'tis:
Inflator and digital pressure gauge
Incidentally, the gauge on the pump is a mile out of calibration (just like a lot of gas station gauges) so I always carry a good quality digital gauge.
Last weekend, we were passing our local Triumph dealer so stopped off to buy oil and a filter. On the counter was a Gryyp-brand puncture repair outfit. I'd read good reports about these so decided to splash out the rather expensive NZ$89 to get one. Here's a picture of the kit:
Gryyp puncture repair kit
The business end of the kit is a threaded plastic key (see close-up below). All you do is mark the puncture location with the thoughtfully-provided chalk, pull out the cause of the puncture with the supplied pliers and turn the threaded key in until the head snaps off. What could be simpler than that and you actually have mechanical grip to hold the plug in.
4 plastic keys supplied in the kit
Must say that I feel a lot happier with this kit in my pack, although I'll still use my still battery-powered pump rather than CO2 cartridges should a puncture occur.
Here's a YouTube demo from UK-based magazine MCN showing how easy the whole process is:
In the video, the commentator talks about replacing the tyre. In a bike puncture I had which must have been in the mid 1990's, a small sliver of tinplate went through the tyre almost immediately I'd left the shop from having a new one fitted! In that instance, the tyre shop simply vulcanised a reinforced patch on the inside of the tyre rather than having to fork out for yet another new tyre.