... safe for packaging most of aerosol products as it uses compressed air as propellant instead of LPG, Freon, Butane gas, ... capper and Dualistic liquid filler.First use compressed air filler with capper fill the compressed air into the can, then cap the ... completely, insulate raw materials from can body, propellant takes compressed air (purification) to substitute propane and butane liquefied petroleum gas ...