Puncture sealant is a liquid product used to repair small punctures in tires, tubes, and other inflatable items. It works by coating the inside of the tire and sealing any holes that may occur, preventing air from escaping. This can help extend the life of tires and reduce the need for frequent repairs. Typically made from a mixture of latex, water, and other additives, puncture sealants can be applied through the valve stem or directly into the tire. They are commonly used in bicycles, motorcycles, and cars, providing a quick and effective solution for minor tire damage.