the present invention discloses air compressor equipment for vehicles and , more particularly , a sealant dispensing unit that can work under upright orientation as well as inverted orientation so as to repair and inflate a punctured tire . the sealant dispensing unit has a first hose connector and a second hose connector . in use , the sealant dispensing unit allows a user to select upright orientation or inverted orientation for an operation , whereby the hose connectors of the sealant dispensing unit may serve as a channel for receiving the high - pressure air or serve as a channel for delivering the chemical sealant . a professional can perform a box design in cooperation with the sealant dispensing unit easily .