Non-Toxic Cast Iron Seasoning, ranked by PFAS grade

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Top-graded picks in the categories readers replace first, every one scored on the same rubric.

Aqua Pure

3M Aqua-Pure AP802B Whole House Filter Housing

95ExcellentPFAS grade

polypropylene filter housing, carbon/sediment cartridge
We found no PFAS statement from the brand
Bacterial growth in spent cartridges

3 hazards checked on this product, all on its full breakdown.

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Aquasure

Premier Series 75 GPD Under Sink Reverse Osmosis Water Filtration System

100ExcellentPFAS grade

RO membrane, carbon filters, stainless steel housing
We found no PFAS statement from the brand
Bacterial and microbial growth in housing and filters

4 hazards checked on this product, all on its full breakdown.

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Avocado

Vegan Mattress

100ExcellentPFAS grade

✓ MADE SAFE Certified✓ Global Organic Textile Standard (GOTS)

organic cotton, natural latex, coconut coir, recycled steel coils
The brand calls it PFAS-free, which we have not verified
Heavy metals

2 hazards checked on this product, all on its full breakdown.

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What we found October 2026

29 of the 32 cast iron seasoning products PFAS Authority has graded score below its 70 point pass mark for PFAS and other toxins, 90.6% of the category, as of October 2026, leaving 3 that pass. The highest graded is Crisbee Stik Cast Iron Seasoning at 85 out of 100.

The full ranking is below, best-graded first, with every score linking to the evidence behind it.

Is cast iron seasoning safe?

3 of the 32 cast iron seasoning products we graded come back low-concern on our screen and 29 do not. Our grades are model-based assessments built from published materials, ingredient lists, certifications and brand disclosures, not laboratory tests, so they say what we can evidence rather than that anything is safe.

Best graded cast iron seasoning here

1Crisbee Stik Cast Iron Seasoning 85 out of 100
2Lodge Cast Iron Seasoning Spray 85 out of 100
3Cast Iron Ultimate Bundle 75 out of 100

By materialCast Iron Uncoated

Start here

The best non-toxic cast iron cookware seasoning & oil, ranked by grade

See the picks →

Buyer’s guide

What to look for in cast iron cookware seasoning & oil, and which brands grade best and worst

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Bad · Better · Best

Cast Iron Cookware Seasoning & Oil, ranked.

The quickest read, what to skip and the top-graded picks worth buying instead.

Avoid65Good

Crisbee

Cream Cast Iron Seasoning Oil Conditioner

65/100 safety

Lower concern. Material as recorded is not linked to PFAS.

Why avoid it

Better75Excellent

Cast Iron Ultimate Bundle

75/100 safety

Lower concern. Bare cast iron with seasoning has no coating on record.

Details Check price

Best pick85Excellent

Crisbee

Stik Cast Iron Seasoning

85/100 safety

Lower concern product, seasoning blend without PFAS-typical markers.

Details Check price

Why Crisbee Stik Cast Iron Seasoning wins, and what it beats

Every grade on this page is one sum. A category starts from a baseline, each disclosed material or coating adds risk points, and each thing the brand or a third party has published takes them away. Below is that sum for the winner, then for 1 product it beats, so you can see exactly where the 10 points between the top and the bottom of this cast iron cookware seasoning & oil ranking come from.

The winner

85Excellent

Crisbee Stik Cast Iron Seasoning

Made of Organic waxes and oils blend.

+15No PFAS disclosure. No public statement from the brand about PFAS in this product.
+10Category baseline. The starting point for this type of product, before anything specific to this product is counted.
-10Base material not linked to PFAS. The main material recorded for this product is not one associated with PFAS.

15risk points in total, which is a grade of 85

What the grade does not fix. It still carries one risk factor, No PFAS disclosure, and our graders recorded 2 other hazards on it. See the full breakdown.

Check price Full breakdown

What it beats, and why

75Excellent10 points behind the winner

Cast Iron Ultimate Bundle

What puts it behind. The winner earns -10 points for Base material not linked to PFAS. We found nothing comparable published for this product.

Made of cast iron, bare or seasoned with the brand.

+30Category baseline
+15No PFAS disclosure
-20Bare uncoated material. Recorded as a bare, uncoated material with no surface coating or treatment.

25risk points, a grade of 75

No product on this page was physically tested by us. Every number above comes from published materials, ingredient and coating disclosures, certifications and brand statements, scored on one public rubric. Formulations change without notice, so check the current product listing before buying.