Mastrad · Silicone Cutting & Prep Boards
Mastrad Pastry Sheet F45210
Skip until Mastrad discloses coating chemistry or certifications.
Mastrad's F45210 pastry sheet uses an unspecified nonstick coating with no public PFAS disclosure. Standard nonstick cookware raises concern without transparency.
The safe swap
Trudeau
Trudeau Glass Drying Mat
90/100 safety
Same rubric that flunked this product. The swap earned its A.
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Silicone-coated fiberglass or unknown 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
The Mastrad F45210 is a pastry sheet with silicone coating over a fiberglass base. Silicone itself is generally inert and heat-stable, but the nonstick coating formula remains unspecified by Mastrad. If that coating contains Teflon-type coating (Teflon) or other fluorinated compounds, heating above recommended temperatures releases toxic fumes. Even if silicone-only, the durability and leachability of the adhesive bonding coating to fiberglass substrate is not publicly documented.
The brand's record and disclosure
Mastrad has not published material safety data sheets, coating chemistry details, or third-party certifications (e.g., FDA food-contact approvals, GOTS, or OEKO-TEX equivalents) for this product. The brand does not publicly address PFAS use or phaseout commitments. This silence is a red flag in a category where transparency on nonstick formulations is now standard practice among safety-conscious manufacturers.
How it compares in its category
Pastry sheets compete with parchment paper, uncoated silicone mats from brands like Lekue or Matfer that disclose food-contact compliance, and ceramic-coated alternatives. Mastrad's lack of third-party verification puts it below certified competitors. Parchment paper avoids coating chemistry risk entirely, though silicone mats are similarly popular if the maker is transparent.
If you buy it
Do not exceed 400°F; most pastry use (baking under 375°F) is safe. Inspect the coating monthly for cracks, peeling, or discoloration, if visible, replace immediately to prevent fiberglass or coating particles in food. Hand wash gently with warm soapy water; avoid abrasive scrubbing and dishwasher cycles that accelerate degradation. Store flat in a cool, dry place away from direct sunlight.
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.”
Teflon-type coating fume risk (if coating contains Teflon-family coating)
Mastrad does not disclose whether the nonstick coating is Teflon-type coating-based. If it is and heated above 500°F (unlikely in normal pastry use but possible in broiler or oven malfunction), polymer fume fever can occur. Without coating specification, this risk cannot be ruled out.
Coating degradation and fiberglass shedding
Silicone-coated fiberglass products are prone to delamination over time, especially with thermal cycling and abrasive washing. If the silicone layer separates, fiberglass fibers may shed into food. Mastrad provides no guidance on expected lifespan or replacement indicators.
Adhesive or primer leaching from coating-substrate bond
The glue or primer bonding silicone to fiberglass is not identified in public materials. Prolonged contact with fatty foods (common in pastry) can accelerate leaching of uncrosslinked oligomers or plasticizers from the adhesive layer. Food-contact certification would mitigate this risk but is absent.
Aluminum leaching (if substrate contains aluminum)
Fiberglass substrates typically do not leach aluminum, but if the product uses an aluminum core or frame, acidic or high-salt foods could mobilize trace aluminum. No evidence of this in available product descriptions, but composition is not fully transparent.
Formaldehyde or VOC off-gassing from fiberglass binder
Fiberglass mats often use formaldehyde-containing phenol-formaldehyde or urea-formaldehyde resins as binders. New Mastrad sheets may emit low levels of volatile compounds. No off-gassing testing or low-VOC certification is published by the brand.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 45% 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 & Prep Boards
Trudeau
Glass Drying Mat
Glass
Glass drying mat has minimal PFAS risk; bare glass material is inherently safe.
⚠Risky category by default
KitchenAid
Classic Nonslip 2-Piece Cutting Board Set
plastic composite, no nonstick coating
Lower concern. Bare plastic cutting boards rarely treated with PFAS.
⚠Risky category by default
Cuisinart
13" Semi-Transparent Polymer Cutting Board
semi-transparent polymer (likely polyethylene or polypropylene)
Lower concern. Bare polymer cutting board unlikely to contain PFAS.
⚠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.