A flat tire can ruin a road trip in seconds, but a tire repair kit might get you moving again without waiting for roadside assistance. They're especially useful in modern cars that come without a spare tire, but knowing how to use one—and when not to—is essential.
Tire repair kits can seal certain punctures, but they're not a fix for every flat. Here's how they work, how to use one, and whether they're worth keeping in your car.
