Smeg · Toaster Ovens
Smeg Enameled Oven Oven Tray BN640
Lower concern; enameled cookware typically avoids PFAS, but Smeg does not disclose coating details.
The Smeg BN640 is an enameled oven tray with a vitreous enamel coating over steel, a material class that generally does not require PFAS-based Teflon-family coating. Smeg does not publicly disclose PFAS status or material sourcing for this product.
Shop Smeg on Amazon →Material
enameled steel
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.
No PFAS disclosure
No public statement about PFAS in this product.
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
The BN640 is enameled steel, meaning a steel base coated with a vitreous (glass-like) enamel surface. This is a traditional, inert cookware material that does not leach aluminum or react with acidic foods, unlike bare aluminum or non-stick coatings. Enamel is fired at high temperature, creating a stable glass layer that resists chipping if handled carefully. The steel substrate itself is chemically stable under normal cooking conditions.
The brand's record and disclosure
Smeg does not publicly disclose detailed coating formulations, heavy metal testing, or third-party certifications for this tray. The brand has no published safety controversy or recall history for the BN640 or similar enameled cookware lines. Smeg is an established Italian appliance manufacturer with general reputation for build quality, though they do not lead on transparency regarding material safety testing compared to some competitors.
How it compares in its category
Enameled steel trays are among the safest toaster-oven cookware options, sitting above non-stick (Teflon-type coating risk) and on par with bare stainless steel. They avoid the leaching risks of unglazed ceramics and the heat-release concerns of silicone or plastic handles. Smeg's enameled cookware is priced at the premium end; budget enamel trays from unknown makers carry slightly higher risk of coating defects or undisclosed lead in enamel pigments, though this is uncommon in developed markets.
If you buy it
Inspect the enamel coating for chips or cracks before and periodically during use; a damaged enamel surface can expose steel underneath. Avoid prolonged high heat (above 500F) as extreme temperature cycling may stress the enamel bond, though normal toaster-oven use is well within safe limits. Hand wash if possible to extend enamel life; dishwasher use is tolerated but may dull the finish over years. Replace only if structural damage occurs or enamel flaking becomes visible inside the pan.
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.”
Lead or cadmium in enamel glaze
No recalls or test reports of lead/cadmium contamination in Smeg enameled cookware are publicly documented. Modern enamel fired in EU/developed markets typically meets strict limits, but Smeg does not voluntarily publish test certificates for this tray.
Enamel coating degradation and metal exposure
Enamel can chip or crack with rough handling or thermal shock (cold water on hot surface). Once compromised, bare steel is exposed; steel itself is inert but cosmetically and functionally undesirable. This is a maintenance issue, not a chemical toxicity issue, for normal home use.
Thermal stress from toaster-oven cycling
Enameled steel is rated for standard toaster-oven temperatures (up to 500F regularly). No failure data is published for the BN640 specifically, but enamel cookware is designed for this use. Extreme preheating or direct flame contact is not relevant to this product.
Microbes or residue if improperly cleaned
Enamel is non-porous and does not harbor bacteria when clean. Standard washing is sufficient; no special sanitization is required unless the tray is visibly soiled or left damp for extended periods.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 78% 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.
Safer alternatives in Toaster Ovens
Sage
Caraway Ceramic Baking Sheet
Ceramic non-stick coating (proprietary formulation)
Lower-concern option; ceramic coating claims PFOA/Teflon-type coating-free, but third-party verification absent.
⚠Risky category by default
Sage
Caraway Home Ceramic Baking Sheet Duo
Ceramic non-stick coating
Lower-concern choice; ceramic non-stick is PFAS-free by design, but unverified third-party testing limits full certainty.
⚠Risky category by default
Miele
Miele Tray
Stainless steel or ceramic (unspecified variant without nonstick coating)
Lower concern, plain cookware tray with no nonstick coating signals minimal PFAS risk.
⚠Risky category by default
More toaster ovens 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.