A hose coupling assembly is provided for use with an ultra low permeable hose. The coupling utilizes multiple sealing techniques to ensure that no refrigerant escapes from the end of the hose. The techniques are mechanical crimping utilizing a shell with barbs, a chemical sealant on the cut end of the hose and between the hose and the shell, annular seals on the nipple portion of the coupling, and an annular weld or braze of the shell to the coupling body.