Repair Geek did the useful thing and stabbed a bunch of tires, so the rest of us do not have to discover which can of roadside optimism works after we are already stranded. The testing is impressive.
I am a fan of the liquid Flat Out. I have been surprised when changing old tubes and have found that the Flat Out has saved me multiple times. I haven't installed it in my car tires, but I am considering it as they are new and should last me years and years. I worry what the stuff might do to the TPMS sensors, however.
The tire goo has spoken.
Previously:
• 1966 photo shows truck full of tires with a flat of its own
• Dumb motorcyclist does burnout at stoplight only to get a flat tire (video)
• If you do not carry this CO2 tire inflator with you on bike rides, it won't help when you have a flat
• Hundreds of flat tires caused by sharp metal debris on road
