Nylon Floss by Butler · Dental Floss
Plus Ultra | Recycled Nylon Floss - Mint | Refillable | Zero Waste Recycled Nylon Mint Floss
Lower concern, nylon floss has no inherent need for PFAS, but recycled content sourcing is opaque.
Dental floss made from recycled nylon is unlikely to contain PFAS, since the application requires no water-resistance, grease-proofing, or non-stick properties where PFAS are typically used.
Shop Nylon Floss by Butler on Amazon →Material
Recycled nylon filament, no specified coating
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Category baseline
cosmetics is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
The full breakdown
What it's made of and why it matters
This product is recycled nylon filament, a polymer that becomes pliable and strong when drawn into thin strands for dental use. Nylon itself is chemically inert in the mouth and does not leach monomers or plasticizers during normal use. The recycled content means the original polymerization happened elsewhere, but nylon's stability means repeated processing and reuse does not degrade its safety profile for brief oral contact.
The brand's record and disclosure
Butler (GUM brand parent company) is a established oral care manufacturer with ISO and dental association approvals for traditional products. No public safety recalls or controversies specific to this floss line are on record. The brand does not disclose coating treatments, dyes, or recycling-process chemicals on available packaging or marketing; this silence on sourcing transparency is the main disclosure gap.
How it compares in its category
Nylon floss is standard in the category and safer than waxed or Teflon-type coating-coated alternatives for ingestion-risk purposes. The recycled angle and refillable format reduce microplastic accumulation from single-use packaging, a real advantage in the zero-waste subset. Mint flavoring (typically natural or synthetic menthol and aroma compounds) is common and carries minimal oral hazard.
If you buy it
Use as directed: short strands (12-18 inches per session), do not swallow, discard after use. Nylon is durable and does not degrade in the mouth during normal flossing. Store the refillable container dry to prevent mold or bacterial growth in the dispenser. Replace the floss spool when strands fray or show visible wear; this product has no heat or temperature-use concerns.
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.”
Dye or colorant toxicity (mint hue origin)
Butler has not disclosed the source of the mint color or flavoring chemicals. Standard food-grade and pharmaceutical-grade synthetic dyes (e.g., FD&C colorants) carry negligible risk for brief mouth contact. No recalls or adverse reports for this product exist.
Recycled content contaminant carry-over
Recycled nylon sourcing and reprocessing history are opaque. If source material included contaminated or mixed polymers, impurities could theoretically persist, though nylon's melting and re-extrusion typically purifies it. No test data for this specific batch or supplier is publicly available.
Ingestion of floss strands
Nylon is not digestible and passes through the GI tract unchanged if small amounts are swallowed during flossing. This is not unique to recycled nylon. Choking risk exists for very young children or those with swallowing difficulty, a category-wide concern, not brand-specific.
Dispenser or refillable container leachables
Packaging material and coating of the refillable dispenser are not specified on available product information. If plastic-based, prolonged storage could allow minor styrene or other volatile compounds to migrate, but the product does not contact liquid or heat.
Mint flavoring allergen or irritant potential
Menthol and mint aroma compounds can trigger contact irritation or allergic reaction in a small subset of users with sensitive oral mucosa. This is not unique to recycled versions and is a personal-sensitivity matter, not a manufacturing defect.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 72% 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 Dental Floss
Cocofloss
Refill Trio
Coconut fiber, based floss with plant-based coating
Lower-concern dental product; natural materials and transparent PFAS stance, but no independent verification.
⚠Risky category by default
Dental Lace
Refillable Silk Dental Floss
Silk floss with compostable refillable packaging
Lower concern; silk floss with credible PFAS-free positioning and third-party certification.
✓Verified PFAS-free by a third party
Dental Lace
Plant Based/Vegan Floss Refillable Glass Container PFAS-Free (2 Spools/4-
Plant-based vegan floss (likely plant cellulose or silk fibers)
Lower-concern product with explicit PFAS-free claim; no third-party verification limits certainty.
⚠Risky category by default
More dental floss 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.