Pyrex · Silicone Cutting & Prep Boards
Silicone Mat Non-Slip Resin Casting Crafts Pad Sheets Protector
Silicone mat poses lower PFAS concern; verify seller authenticity first.
Silicone is inherently PFAS-free without nonstick coating or waterproof treatment. Verify seller authenticity, as counterfeit Pyrex is common.
The safe swap
Tovolo
Tovolo TrueBake Silicone Baking Mat
80/100 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
silicone mat, no coating disclosed
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
What’s concerning
Category baseline
PFAS exposure happens more often with clothing products.
No PFAS disclosure
The company has not publicly discussed PFAS in this product.
Silicone degradation and leaching (non-toxic but physical)
Lower-grade silicone can shed microscopic particles or off-gas volatile organic compounds when heated repeatedly or exposed to high temperatures. Food-grade silicone is far more stable, but product certifications are absent in this listing.
Contamination from manufacturing residues
Silicone mats sourced from unregulated manufacturers may retain solvents or catalysts used during polymerization. No third-party testing or FDA registration is visible for this product.
Counterfeit product risk
Pyrex-branded silicone mats sold through unauthorized channels frequently turn out to be non-Pyrex rebranded goods with undisclosed material sourcing. Verify seller authenticity to minimize exposure to unknown manufacturing standards.
What’s reassuring
Safe base material
Made from ceramic, mineral, or natural fiber with no PFAS risk.
Lead
Silicone itself does not contain these metals, but colored silicone mats may use pigments with heavy-metal contaminants if produced outside regulated regions. No information on this product's pigmentation is disclosed.
Source: ATSDR ↗Coating degradation (non-applicable here)
Silicone mats have no applied coating layer, so peeling, flaking, or corrosion typical of enameled or glazed cookware is not a concern. The silicone body itself is the functional surface.
The full breakdown
What it's made of and why it matters
This product is a silicone mat, a polymer of silicon and oxygen that does not contain the ceramic glazes, enamels, or non-stick coatings typical of traditional cookware hazards. Silicone mats are non-porous and do not leach metals like lead, cadmium, or aluminum under normal temperatures. The main concern is material purity: lower-grade silicone can contain residual volatile compounds or contaminants from manufacturing, though food-grade silicone used by reputable makers is relatively stable.
The brand's record and disclosure
Pyrex is well-known for borosilicate glass cookware, not silicone products. This mat listing under the Pyrex brand is unusual and raises authenticity questions. Pyrex has no published safety certifications or disclosure statements specific to silicone mats. Counterfeit or third-party Pyrex-branded silicone mats are common on online marketplaces; verify the seller is an authorized Pyrex distributor before purchase.
How it compares in its category
Silicone mats are safer than traditional non-stick cookware coated with Teflon-type coating or ceramic glazes that may contain heavy metals. They avoid aluminum and Teflon-type coating fume risks entirely. However, the broader cookware category rarely includes silicone mats; this product is marketed for resin casting and crafts, not food preparation, which suggests it may not meet food-contact standards.
If you buy it
Do not use for food cooking or storage if the product explicitly states it is for crafts only. If using for food, confirm food-grade certification from the seller. Clean before first use with warm soapy water. Keep below 400 degrees Fahrenheit to avoid silicone degradation. Inspect regularly for tears, discoloration, or odor changes, which signal replacement. Avoid prolonged contact with strong solvents.
What we don’t know
- Basis
- Model estimate, 72% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Pyrex has made none
Formulations change between production runs, so check the current label. How we grade.
Safer alternatives in Silicone Cutting & Prep Boards
Silikomart
Silicone Grip Mat
silicone rubber grip mat, non-coated
Siloxane leaching (low-molecular-weight oligomers)
Limited concern
Microparticle shedding from grip surface
Limited concern
Mold or bacterial growth in surface texture
Limited concern
Low concern; silicone grip mats rarely contain PFAS.
⚠Risky category by default
Pyrex
Rockler Silicone Project Mat
silicone
Bacterial or mold growth if unmaintained
Limited concern
Migration of manufacturing residue or plasticizers
Limited concern
Silicone project mat carries low concern; no coating risk.
⚠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
Thermal shock fracture and cutting hazard
Moderate concern
Lid or handle coating hazards
Limited concern
Minimal concern. Pyrex borosilicate glass is inherently PFAS-free.
⚠Risky category by default
More silicone cutting & 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.