Mastrad Review, Is Mastrad Non-Toxic?
PFAS Authority is a scoring system, not a laboratory. We do not test products ourselves. Grades are model-based, built from published ingredients, materials, certifications, brand disclosures and third-party lab results where they exist. See the rubric.
Across 2 graded products, Mastrad averages Poor (40/100). On disclosure, the brand says nothing publicly about PFAS. None of its products grade Good or better yet. Grades are model-based estimates, not lab results.
Graded and flagged Poor and Bad, we’d swap these
Mastrad
Craft Smart Silicone Craft Mat
silicone (gel-based)
Silicone polymer leaching (low-molecular-weight oligomers)
Gel silicone can release trace cyclic oligomers into fatty foods at high heat. For…
Thermal degradation and off-gassing
If overheated above manufacturer limits, silicone can emit odorous volatile compounds.…
Bacterial contamination and biofilm growth
Silicone's porous microstructure can harbor bacteria if not dried thoroughly between…
Silicone craft mat carries minimal PFAS concern.
⚠Risky category by default
Mastrad
Scrapbook.com Non-Stick Silicone Craft Mat
Silicone
Mold or bacterial growth from moisture retention
Silicone mats can trap moisture in creases or seams if stored wet or in humid conditions…
Silicone mats pose lower PFAS concern than coated cookware.
⚠Nonstick, coating undisclosed
Every grade uses the same public rubric. How grades work →