Pyrex · Silicone Cutting & Prep Boards
LET'S RESIN Extra Large Silicone Mat for Crafts
Silicone craft mat poses lower PFAS concern than nonstick cookware.
Silicone is an inherently PFAS-free material without Teflon-family coating coatings. No brand PFAS claims found, but product category carries minimal traditional PFAS risk.
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Material
silicone
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
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 elastomer mat, not a nonstick-coated surface, so it does not rely on Teflon-type coating or Teflon-family coating coatings that degrade under heat. Silicone is a chemically inert polymer that remains stable across typical craft and light cooking temperatures (silicone mats are often rated to 400-500F). The material does not leach plasticizers, BPA, or phthalates because it is not formulated with them; silicone's cross-linked structure is fundamentally different from PVC or polycarbonate plastics.
The brand's record and disclosure
Pyrex has not published a detailed PFAS statement for its silicone products, which is a transparency gap given industry scrutiny of fluorochemicals in kitchen items. The brand's broader cookware lines (glass baking dishes, vintage colored glassware) have faced historical lead-in-glaze concerns decades ago, though modern Pyrex products are not known to carry that legacy hazard. No recalls specific to this silicone mat have been recorded by the CPSC. Pyrex's parent company (Groupe SEB) has adopted some chemical disclosure practices but not universal PFAS phase-out commitments.
How it compares in its category
Silicone craft mats occupy a lower-risk tier than traditional nonstick cookware (Teflon-type coating-coated pans, where fume inhalation and coating degradation are documented concerns). They also avoid the aluminum leaching risk of bare metal baking sheets. Craft-grade silicone mats are chemically similar to food-grade silicone baking mats and cake molds, which have an established safety track record in home and commercial kitchens. The 'craft' designation suggests non-food use, but silicone composition does not differ materially for that distinction.
If you buy it
Keep the mat below 500F to avoid any remote risk of silicone degradation; most craft use (resin curing, jewelry work) occurs well below that. Inspect the mat annually for visible cracks, discoloration, or odor changes; replace if degradation appears. Do not use in direct flame or extreme heat cycling. Pyrex's matte gray silicone formulations have not generated user reports of leaching or off-gassing, but silicone can retain odors from solvents; air out new mats in a ventilated space for 24 hours if odor is noticeable.
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.”
Silicone degradation and microparticle shedding
Silicone elastomers can release small particles or oligomers under prolonged high heat or repeated mechanical stress (folding, kneading). For a craft mat used at room temperature or gentle craft temperatures, this risk is minimal; risk rises if the mat is repeatedly heated above 450F or flexed aggressively.
Off-gassing of volatile organic compounds (VOCs)
New silicone products sometimes emit trace VOCs during curing or storage. Pyrex's mat may release a temporary silicone odor when first unpacked. This is not toxic at typical domestic exposure levels but can be unpleasant; ventilation resolves it within 24-48 hours. No reports of harmful VOC profiles from this specific product exist.
Lead or cadmium in pigmentation or dyes
Silicone mats do not use glazes or enamel coatings where lead or cadmium contamination occurs in cookware. Pyrex's gray silicone formulation does not rely on pigments known to carry heavy-metal risk. No recalls or testing reports have flagged this concern for silicone mats.
Allergen or sensitization from silicone compounds
Food-grade and craft-grade silicones have a low allergenic profile and do not typically trigger contact dermatitis in the general population. No documented cases of allergic reaction to Pyrex or similar silicone mats have been recorded in public safety databases.
Adhesive or substrate contamination (if layered construction)
This product is a solid-cast or molded silicone mat; it is not a laminate or adhesive-bonded assembly. Single-material construction eliminates the risk of secondary chemical leaching from binding agents. Pyrex's mat design does not use textile bases or metal mesh cores that could introduce contaminants.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 82% 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 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.