Xtrema · Cookie Sheets
New Xtrema 4 qt rectangular baking dish
Lower PFAS concern, Xtrema baking dishes are borosilicate glass with no coating.
Xtrema's rectangular baking dishes are made from borosilicate glass, which does not use PFAS-based nonstick coatings or Teflon-family coating. The brand does not market PFAS-free claims because the material category itself avoids the concern. Glass bakeware is a lower-risk choice for cookware.
Shop Xtrema on Amazon →Material
Borosilicate glass (Xtrema signature product line)
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
Xtrema baking dishes are borosilicate glass, a high-silica formulation designed for thermal shock resistance and chemical inertness. Unlike ceramic-coated or metal cookware, borosilicate glass does not leach metals, off-gas fumes, or degrade under repeated heating. The material is inherently non-reactive with acidic or alkaline foods, making it one of the safest substrate choices for oven use.
The brand's record and disclosure
Xtrema does not publish detailed safety certifications or third-party testing results on their website, reflecting a broader industry norm for glass bakeware. No recalls, contamination reports, or safety controversies are on record for Xtrema baking dishes. The brand's silence on PFAS is immaterial because the borosilicate glass substrate itself contains no Teflon-type coating coatings or fluorinated additives where PFAS would appear.
How it compares in its category
Most ceramic or enameled baking dishes carry residual risks of lead/cadmium in glazes or coating breakdown over time; metal baking sheets may involve non-stick coatings with Teflon-type coating or silicone concerns. Borosilicate glass bakeware like Xtrema avoids these hazards entirely and ranks among the safest category options. The trade-off is weight and fragility compared to metal.
If you buy it
Borosilicate glass can withstand oven temperatures up to 500F; avoid thermal shock by letting it cool before washing. Inspect for chips or cracks before each use, as damaged glass poses injury and potential contamination risks. The material is dishwasher safe and requires no special seasoning or maintenance. Glass retains heat longer than metal, so adjust baking times slightly or use lower rack positions.
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 and fracture
Borosilicate glass is resistant to thermal shock but not immune; moving from freezer directly to hot oven or pouring cold liquid into a hot dish can cause cracking. Inspect regularly for visible damage.
Lead or cadmium in glass
Borosilicate glass does not rely on lead or cadmium stabilizers as ceramic glazes do. No published reports of heavy metal contamination in Xtrema products.
Coating degradation and leaching
Xtrema baking dishes have no coating; the borosilicate glass itself is the functional surface. No risk of peeling enamel, ceramic flaking, or metal exposure.
Teflon-type coating/silicone fume release
Borosilicate glass is not treated with non-stick coatings. No thermal decomposition or fume hazard at normal oven temperatures.
Microcracking and microplastic shedding
Unlike some plastics used in food storage, borosilicate glass does not shed microplastics under heating or mechanical stress. Visible cracks are the only structural failure mode.
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.