If you don’t have the luxury of having a spare tire, tire sealant is a possible, low-cost replacement. For about $20 to $30 a bottle, tire sealant will let you seal very small punctures. The tire repair kits include an air compressor, so you can apply the sealant and reinflate your tires. However, keep in mind that this is only a temporary fix, and an option best saved for small punctures that appear on the tire tread, not the sidewall. In many cases, a tire should be replaced after applying the sealant and reaching your destination. Be sure to read all the instructions on and know the limitations of your tire-repair kit and/or sealant.