most common use is as a solvent as oil-based solutions dissolve in it. This makes it the ideal base for many paints, waxes, dyes and resins. It is also used as a solvent in paint thinners and stain removers.
Diisopropyl ether is secondary ether that is used as a solvent. It is a colorless liquid that is slightly soluble in water, but miscible with organic solvents. It is used as an extractant and an oxygenate gasoline additive