Pyrex · Cookie Sheets
Pyrex 3-Piece Large Cookie Sheet Set
Buy, borosilicate glass cookware carries minimal PFAS risk.
Pyrex cookie sheets are made from borosilicate glass, a material that does not require PFAS-based nonstick or water-resistant coatings. Glass is inert and does not off-gas fluorinated chemicals. Pyrex does not market PFAS-free claims because the material itself is inherently PFAS-free.
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borosilicate glass
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Category baseline
cookware is a category where PFAS exposure is more common.
Uncoated safe material
Bare, uncoated material (cast iron, stainless, carbon steel, or glass) with no surface treatment to contain PFAS.
The full breakdown
What it's made of and why it matters
Pyrex cookie sheets are borosilicate glass, a silica-based material engineered to withstand thermal shock and oven temperatures up to 425-500°F without cracking. Borosilicate glass does not leach metals, does not contain Teflon-type coating or ceramic coatings that degrade, and does not off-gas volatile compounds when heated. This material is chemically inert with food, making it one of the safest cookware substrates available for baking.
The brand's record and disclosure
Pyrex (owned by Instant Brands) has manufactured borosilicate glassware for over a century with no established pattern of safety recalls or chemical contamination issues specific to their cookie sheets. The brand does not publicly highlight PFAS avoidance in marketing, but borosilicate glass products inherently carry no PFAS manufacturing process. No formaldehyde resins, dyes, or coatings are used in the bakeware itself.
How it compares in its category
Glass cookie sheets are among the safest options in this category, avoiding the Teflon-type coating fume risk present in nonstick metal sheets and the potential metal leaching from bare aluminum or steel. Some consumers prefer them over ceramic-coated alternatives because there is no coating to chip or degrade over time. The trade-off is that glass conducts heat differently than metal, which may require adjusting bake times and temperatures by 25°F downward.
If you buy it
Avoid sudden temperature changes (do not move a hot sheet directly to a cold counter) to prevent cracking from thermal shock. Hand wash or use the top rack of the dishwasher; the high-heat drying cycle is safe. Borosilicate glass is durable; replace only if cracked or visibly damaged. Do not use under a broiler or direct flame, as localized overheating can cause failure.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Thermal shock cracking
While borosilicate glass is designed for thermal resilience, rapid temperature changes (e.g., placing a hot sheet on a cold surface) can cause cracking. This is a mechanical rather than chemical hazard but results in sharp glass fragments.
Lead or cadmium in glazes or enamel coatings
Pyrex cookie sheets are unglazed borosilicate glass with no ceramic or enamel coatings. No published testing has identified lead or cadmium contamination in Pyrex bakeware.
Teflon-type coating fume emissions (Teflon degradation)
These sheets are bare glass and contain no Teflon-type coating or nonstick coating, eliminating this hazard entirely.
Aluminum leaching
Borosilicate glass is not aluminum; no aluminum substrate is present in this product, so leaching does not apply.
Off-gassing or volatile organic compounds (VOCs)
Borosilicate glass does not release VOCs or formaldehyde when heated. No resins, adhesives, or organic coatings are involved in the product's construction.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 92% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
More cookie sheets 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.