Argon is very useful because of its total inertness at high temperatures. It is used in critical industrial processes such as the manufacturing of high quality stainless steels and production of impurity- free silicon crystals for semi- conductor manufacture. Argon is used as an inert filler gas for light bulbs and as dry filler for the space between glass panels in high efficiency multi-pane windows.

Argon is used for purging applications by providing an inert atmosphere.