Compostables Ltd Review, Is Compostables Ltd 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 4 graded products, Compostables Ltd averages Poor (38/100). On disclosure, the brand says nothing publicly about PFAS. 1 of its products grade Good or better. Grades are model-based estimates, not lab results.
Worth buying from Compostables Ltd Good or better, safest first
Compostables Ltd
Responsible Products 32 oz Compostable Bowl Sugarcane Fiber
Sugarcane fiber (bagasse)
Mold and microbial growth if stored improperly
Sugarcane fiber is hygroscopic and can retain moisture, creating conditions for mold or…
Coating or waterproofing additives (if present)
Some bagasse bowls use petroleum-based or synthetic polymer coatings to improve water…
Fiber degradation and particle shedding under heat or mechanical stress
Bagasse fiber can fragment or shed small particles if exposed to temperatures above its…
Lead
Industry-wide issue: many bagasse products marketed as compostable fail to meet…
Lower PFAS concern, though brand transparency is needed.
⚠Risky category by default
Graded and flagged Poor and Bad, we’d swap these
Compostables Ltd
Dart Compostable Molded Fiber Dinnerware ProPlanet Seal
molded fiber (likely kraft pulp) with unspecified water-resistant coating
Water-resistant coating composition (unspecified)
Molded fiber dinnerware typically requires hydrophobic treatment. Without disclosure, the…
Coating migration into food
Any water-resistant surface on molded fiber can potentially leach components into food…
Fiber degradation and microparticle release
Repeated washing, microwave use, or physical wear can cause the fiber substrate to shed…
Bacterial or mold growth in damaged coating
If the water-resistant coating cracks or peels, the exposed kraft pulp becomes absorbent…
Avoid without coating disclosure, molded fiber food packaging often relies on PFAS water barriers.
⚠Waterproof or stain-proof treatment
Compostables Ltd
Matter Compostable Fiber Disposable Bowls
compostable fiber with unspecified waterproof coating
PFAS
Compostable fiber bowls commonly use Teflon-family coating or fluorocarbon-based water…
Non-fluorinated coating degradation and leachates
If the coating is non-fluorinated (e.g., polyurethane or wax-based), long-term hydrolysis…
Microplastic or fiber shedding
Compostable fiber bowls can shed microfibers, especially if the coating degrades or the…
Formaldehyde / VOCs
Plant fiber bowls often use formaldehyde-releasing adhesives or resins during…
Medium-high risk. Skip until coating is disclosed.
⚠Waterproof or stain-proof treatment
Compostables Ltd
Round Compostable Molded Fiber Bowl - 24 oz.
Molded fiber (pulp) with unspecified water-repellent coating
PFAS
Unspecified coating chemistry is typical of PFAS-based formulations; no brand disclosure…
Coating degradation and microparticle release
Molded fiber coatings can flake or leach binders under heat, moisture, or mechanical…
Formaldehyde / VOCs
Fiber molding adhesives and coating binders may contain low levels of formaldehyde…
Avoid until the brand discloses what coating chemistry was used.
⚠Waterproof or stain-proof treatment
Every grade uses the same public rubric. How grades work →