Reynolds Kitchens Slow Cooker Liners
Skip until Reynolds confirms coating details and PFAS status.
These single-use plastic liners have a nonstick or release coating, but Reynolds won't disclose the chemistry or PFAS status. Nonstick coatings on liners raise PFAS concerns.
The better-graded swap
Slow Cooking Liners
90/100 safety
Same rubric that flunked this product. The swap earned Excellent.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Plastic/polymer liner with unspecified nonstick or release coating
Lab data
No public lab test
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What Reynolds Kitchens Slow Cooker Liners is made of, ingredients and materials
Reynolds slow cooker liners are thin plastic polymer bags, typically polyethylene or polypropylene, with an undisclosed nonstick or release coating applied to prevent food sticking and ease cleanup. The coating composition is the critical unknown, nonstick polymers in food-contact applications historically rely on Teflon-type coating or Teflon-type coating-like fluorinated compounds, though some newer products use silicone or ceramic alternatives. Without Reynolds publicly specifying the coating chemistry, the risk profile cannot be fully assessed. Heat exposure in slow cookers (typically 170-210°F on low, 280°F+ on high) can degrade polymer integrity and potentially increase leaching if the coating degrades.
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
Non-stick, chemistry undisclosed
Marketed as non-stick without stating the coating chemistry.
Polymer thermal degradation and leaching
Polyethylene and polypropylene liners soften at sustained high heat (above 210°F). If the slow cooker temperature is set to high or if the liner comes into direct contact with the heating element, the plastic can degrade and release oligomers and degradation byproducts into food. Risk is low on low settings but not zero.
Nonstick coating leaching (Teflon-type coating/fluorinated alternatives)
The undisclosed coating is the primary concern. If it is Teflon-type coating-based, heating above 500°F causes toxic fume release (unlikely in slow cookers, which max around 280°F); at normal slow cooker temperatures, microscopic Teflon-type coating particles or fluorine-containing leachates may migrate into acidic or oily foods. Without disclosure, risk cannot be quantified.
Microplastics
Single-use disposal and reuse attempts may fragment liners over time, particularly at high temperatures or if the liner tears. Ingestion of microplastic particles has uncertain health effects but is increasingly documented in food-contact polymer applications. This is especially relevant if liners are accidentally reused or torn during cooking.
Source, EPA ↗Unlabeled additives in coating formulation
Food-contact polymer coatings often contain slip agents, antiblock additives, or colorants not listed in consumer-facing marketing. Reynolds does not break down the coating formulation on packaging. Such additives may leach at elevated temperatures, and without transparency, consumer risk assessment is impossible.
What’s reassuring
BPA & bisphenols
Reynolds has not disclosed whether the polyethylene or polypropylene base contains BPA or phthalate plasticizers. These compounds are rare in modern food-contact polyethylene, but absence of explicit confirmation leaves uncertainty. Leaching risk increases with heat and prolonged food contact.
Source, FDA ↗How is this PFAS grade calculated?
The brand's record and disclosure
Reynolds has not publicly disclosed PFAS-free certification or coating material specifications for these liners despite growing industry scrutiny of fluorochemicals in food-contact products. The company maintains a general 'food-safe' posture but has not voluntarily adopted third-party PFAS testing or committed to fluorine-free alternatives for this product line. No major recalls or safety violations have been documented for Reynolds slow cooker liners specifically, but the silence on coating composition is itself a disclosure failure in the current regulatory environment.
How it compares in its category
Slow cooker liners in general are convenience products; alternatives include uncoated ceramic/stoneware inserts (no hazard of this kind on record but require hand-washing), silicone liners (increasingly available, reported by manufacturers as PFAS-free but less established durability data), and simply cooking without a liner (no chemical exposure from this source). Reynolds is a major branded player in the disposable liner space, competing with store brands and silicone options. The lack of coating transparency puts Reynolds liners in a weaker disclosure position than competitors that explicitly market PFAS-free or Teflon-type coating-free status.
If you buy it
Keep slow cooker temperature on the low setting (170-210°F) to minimize polymer stress and coating degradation; avoid high settings or extended pre-heating. Do not reuse liners; they are single-use and degradation compounds in repeat heating cycles. Inspect the liner for tears, discoloration, or clouding before each use; discard if damage is visible. If you choose to use these pending better disclosure from Reynolds, consider switching to silicone reusable liners or uncoated ceramic inserts as an interim measure, and pressure Reynolds to publish coating material specs.
What is not known about PFAS in this product?
- Basis
- Model estimate, 45% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Reynolds has made a specific claim
Formulations change between production runs, so check the current label. How we grade.
What are the PFAS-free alternatives to Reynolds Kitchens Slow Cooker Liners?
Slow Cooking Liners
- Unbleached parchment paper
- The brand calls it PFAS-free, which we have not verified
- Thermal degradation and smoke release
2 hazards checked on this product, all on its full breakdown.
Slow Cooker Liners - 4 Pack
- Plastic (polyethylene or similar polymer liner)
- We found no PFAS statement from the brand
- Microplastic shedding during heating
2 hazards checked on this product, all on its full breakdown.
Find an alternative on Amazon
- polyethylene/plastic liner
- Polyethylene integrity failure (tearing, leaching)
3 hazards checked on this product, all on its full breakdown.
Find an alternative on AmazonMore slow cooker liners grades
How we score, every product runs through the same public 0-100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.