Pyrex · Silicone Cutting Mats & Prep Boards
Tupperware Wonder Mat
Nonstick coating not disclosed; no public PFAS safety data available.
Pyrex Wonder Mat is a silicone baking mat with unknown nonstick properties. Brand provides no PFAS transparency; composition details remain unclear to consumers.
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Material
Silicone baking mat, unspecified nonstick coating
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Non-stick, chemistry undisclosed
Marketed non-stick without stating the coating chemistry.
Category baseline
cookware is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
The full breakdown
What it's made of and why it matters
This product is a silicone baking mat with an unspecified nonstick coating applied to the surface. Silicone itself is considered inert and heat-stable, but the nonstick layer's chemistry is not publicly disclosed by the brand, making it impossible to rule out Teflon-type coating or other fluorinated compounds. The mat's performance depends entirely on the durability and stability of that coating; if it degrades or flakes, both the mat's functionality and potential contaminant release become concerns.
The brand's record and disclosure
Pyrex is owned by Instant Brands and has a mixed history on transparency regarding cookware coatings. The company has not published detailed material safety data or PFAS testing results for this specific mat. No major recalls or public health actions specific to Tupperware Wonder Mat silicone mats are on record, but the lack of disclosure around the nonstick formulation is itself a red flag for informed purchasing. Pyrex has faced scrutiny in recent years over glass cookware durability but has not proactively addressed PFAS concerns in non-glass product lines.
How it compares in its category
Silicone baking mats occupy a middle ground: they avoid the Teflon-type coating and potential PFOA concerns of traditional Teflon cookware but depend on the coating vendor's formulation integrity. Many premium silicone mat makers (e.g., Artisan, OXO) publish material certifications; Pyrex's silence on coating specifics makes this product less transparent than category leaders. Uncoated parchment paper and bare glass or cast iron remain the lowest-risk alternatives if PFAS avoidance is a priority.
If you buy it
Keep the mat below 400-450°F; sustained high heat can degrade silicone coatings and accelerate any leaching. Inspect regularly for visible wear, flaking, discoloration, or peeling; replace immediately if the surface is compromised. Hand-wash gently and avoid abrasive scrubbers and scouring pads, which can strip the nonstick layer. Do not use under broilers or direct flame, and store flat in a cool, dry place to extend coating life.
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.”
Nonstick coating degradation and leaching
The undisclosed nonstick formulation may leach into food if the coating chips, cracks, or degrades with age or heat exposure. No public testing of this specific product is available; risk depends on whether the coating contains Teflon-type coating or other reactive compounds.
Silicone filler and additive migration
Food-grade silicone itself is considered low-risk, but some bulk silicone formulations contain trace plasticizers or vulcanization residues. No reported issues with Pyrex silicone mats exist in public records.
Heat-induced coating failure and flaking
Silicone baking mats in general are known to degrade at temperatures above 400-450°F; flaking or peeling has been reported by users on cookware forums, increasing contamination risk if fragments enter food.
Unverified nonstick formulation safety
Without disclosure of the coating's chemistry or third-party certification (FDA approval alone does not guarantee PFAS absence), the specific chemical composition remains a black box for the consumer.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 42% 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 Silicone Cutting Mats & Prep Boards
Silikomart
Silicone Grip Mat
silicone rubber grip mat, non-coated
Lower concern. Silicone grip mats rarely contain PFAS.
⚠Risky category by default
Pyrex
Rockler Silicone Project Mat
silicone
Silicone project mat carries lower PFAS concern.
⚠Risky category by default
Pyrex
1, Size: 29cm/11.42 x 26cm/10.24 (Approx.)40cm/15.75 x 30cm/11.81 (Approx.)50cm/19.69 x 40cm/15.75 (Approx.)60cm/23.62 x
borosilicate glass
Lower concern. Pyrex glass cookware is borosilicate, inherently PFAS-free.
⚠Risky category by default
More silicone cutting mats & prep boards 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.