Other industrial uses for corn oil include soap, salve, paint, erasers, rustproofing for metal surfaces, inks, textiles, nitroglycerin, and insecticides.

Almost all corn oil is expeller-pressed, then solvent-extracted using hexane or 2-methylpentane (isohexane).

After extraction, the corn oil is then refined by degumming and/or alkali treatment, both of which remove phosphatides.

Alkali treatment also neutralizes free fatty acids and removes color (bleaching).

Final steps in refining include winterization (the removal of waxes), and deodorization by steam distillation of the oil at 232–260 °C (450–500 °F) under a high vacuum.