+Drying oil is an [Oil](/wiki/oil) that hardens into a tough, solid film upon exposure to air, primarily through [Polymerization](/wiki/polymerization). This transformation makes it valuable in paints, varnishes, and as a protective wood finish.
+## See also
+- [Linseed Oil](/wiki/linseed_oil)
+- [Wood Finish](/wiki/wood_finish)
+- [Fatty Acid](/wiki/fatty_acid)
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