Nylon Floss by Butler · Dental Floss
Sunstar Butler Gum ButlerWeave Floss, Waxed, 4 yd, Mint, 144/Pk, 1815PQB | Frontier Dental
Lower PFAS concern; standard nylon floss with minimal risk profile.
Butler ButlerWeave is a conventional waxed nylon dental floss with no disclosed Teflon-family coating or non-stick treatment. Nylon and wax coatings are not known PFAS vectors in dental floss. No brand claims about PFAS are available, and no third-party lab testing of this specific product is publicly documented.
Shop Nylon Floss by Butler on Amazon →Material
Nylon filament, waxed
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
Butler ButlerWeave Floss is a nylon filament floss coated with wax, likely paraffin or beeswax-based. Nylon is a synthetic polymer that does not leach known endocrine disruptors or heavy metals under normal oral use conditions. The wax coating serves to reduce friction, ease threading between teeth, and provide minor antimicrobial or lubricating benefit; wax itself has minimal toxicity risk in the mouth since it is not absorbed systemically and is typically expelled or swallowed in negligible amounts.
The brand's record and disclosure
Butler (Sunstar subsidiary) is a longstanding dental-care manufacturer with no established recalls or safety advisories tied to this floss product. The brand does not publish detailed ingredient transparency or third-party safety certifications (e.g., FDA clearance for this specific SKU is not publicly documented as unusual). No public controversy regarding chemical hazards in Butler floss products has been recorded in consumer safety databases or dental health literature.
How it compares in its category
Nylon waxed floss is the mainstream dental floss category and carries a lower chemical hazard profile than some alternatives. Unwaxed nylon floss is functionally equivalent but may shred more easily; polytetrafluoroethylene (Teflon-type coating) floss carries specific Teflon-type coating fume concerns if heated, which does not apply to normal flossing. Natural silk floss is an alternative but offers no established safety advantage and may harbor more bacterial colonization if stored improperly.
If you buy it
Use as directed on the package: gently insert between teeth and move up and down to remove plaque. Nylon floss is durable and does not degrade from saliva, water, or normal mouth temperature. Store in a cool, dry location to prevent mold or bacterial growth in the dispenser; discard if the package is opened and unused for more than 6 months. Replace individual dispensers when floss becomes difficult to unwind or if visible mold appears.
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.”
Wax coating composition and purity
Butler does not publicly disclose whether the wax is food-grade, medical-grade, or contains additives (e.g., dyes, fragrance compounds). No recalls or adverse events linked to wax composition in this product line are on record. Mint flavoring is typically added as a food-safe flavoring agent but ingredient detail is not provided on the package.
Nylon filament degradation and microfiber shedding
Nylon floss may shed microscopic fibers if frayed or shredded during use, but these are expelled during or after flossing and are not systemically absorbed. No evidence that dental floss microfibers accumulate in oral tissues or pose a recognized health risk at normal use frequencies.
Mint flavoring allergens and oral sensitivity
The mint flavoring may trigger contact dermatitis or oral irritation in individuals with mint or menthol sensitivity. This is a known but rare adverse reaction not specific to Butler brand; users with known sensitivities should switch to unflavored variants.
Dispenser packaging leachables
The plastic or cardboard dispenser packaging is not detailed; no specific hazards from container material are documented for this SKU. Standard dental floss packaging does not undergo heat or prolonged chemical contact that would trigger significant leaching.
Bacterial or mold colonization if stored improperly
Like all moist or humid environments, an open floss dispenser can harbor bacterial or fungal growth if left in a damp bathroom without air circulation. This is a storage-practice issue, not a manufacturing defect, and is preventable with basic dry storage.
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.