Cast Iron Ultimate Bundle vs Cast Iron Seasoning Oil: which is safer?
Cast Iron Ultimate Bundle is the clear pick. Field Company Cast Iron Seasoning Oil carries a failing PFAS grade, and we never recommend buying a failing product.
Our pick
Coconut Oil
Cast Iron Ultimate Bundle
PFAS grade
Excellent 90/100
Overall grade
Excellent 82/100
Verdict
Buy
Hazard flags
⚑ 2
Material
cast iron, bare or seasoned with coconut oil
Confidence
92%
PossibleIron leaching into food
PossibleRust and surface degradation
Field Company
Cast Iron Seasoning Oil
PFAS grade
Good 65/100
Overall grade
Good 57/100
Verdict
Skip
Hazard flags
⚑ 2
Material
Hemp oil seasoning, applied to bare cast iron
Confidence
82%
PossibleOil oxidation and rancidity
PossibleSmoke or fume inhalation at high heat
Where these two actually differ
- We flag Iron leaching into food and Rust and surface degradation on the Coconut Oil and not on the Field Company.
- We flag Oil oxidation and rancidity and Smoke or fume inhalation at high heat on the Field Company and not on the Coconut Oil.
- The Coconut Oil is cast iron, bare or seasoned with coconut oil where the Field Company is Hemp oil seasoning, applied to bare cast iron, which is most of the difference in these two grades.
- The gap is 25 points, wide enough that this is not a close call, and the Coconut Oil is the one to buy.
Both products run through the same public rubric: materials, coatings, brand disclosure, lab findings, and recalls, plus a beyond-PFAS hazard analysis. Grades are model-based estimates, not lab tests. How grades work →
More cast iron cookware seasoning & oil: see the full ranking