The polymerized layer is extremely brittle and prone to cracking and flaking off the metal. However, this speed is also its downfall.
Cold Smoke Point Oil for Seasoning Iron: The Key to a Durable Nonstick Layer
Vegetable Shortening While technically a fat rather than a pure oil, vegetable shortening—such as Crisco—delivers exceptional results. When you heat a drying oil—such as flaxseed or vegetable oil—to its smoke point, the fatty acids break down and bond with the metal, forming a hard, plastic-like coating.
However, not all oils are created equal. It has a neutral flavor, a high smoke point, and a balanced fatty acid profile that polymerizes into a tough, smooth surface.
Cold Smoke Point Oil for Seasoning Iron
It is affordable, widely available, and produces a matte finish that feels smooth to the touch without being overly slick. Follow this sequence to ensure a strong bond between the oil and the metal.
More About What oil to season cast iron
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