A car puncture repair kit typically contains essential tools and materials to temporarily repair a punctured tire and get you back on the road. Tire Sealant is usually a liquid or gel substance that you inject into the tire through the valve stem. It's designed to seal the puncture and reinflate the tire. Air Compressor or Inflator include a portable air compressor or inflator that plugs into your car's power outlet (cigarette lighter socket) to reinflate the tire after using the sealant.