"qiangbao?tire sealer and inflator foam"is one more hi-tech product of wanshida company.as a tire inflating product for contingency use, it can both repair tire puncture and inflate the tire.when a car becomes unable to run due to a flat tire, you can fill the tire with this foam through the valve of the tire. the foam will rapidly expand to inflate the tire so that you can go on driving. besides, the foam can gradually become gas and sealing material, which can evenly spread over the surface of the inner tire and form a protective film to block the puncture.