Nylon Floss by Butler · Dental Floss
Butlerweave Dental Floss
Lower PFAS concern; standard nylon floss without known coatings or treatments.
Butlerweave Dental Floss is plain nylon monofilament with no published evidence of Teflon-family coating coatings or water/stain treatments that would introduce PFAS. The brand makes no PFAS claims. Dental floss is a brief-contact oral product with minimal ingestion risk; nylon alone is lower concern than treated or coated products.
Shop Nylon Floss by Butler on Amazon →Material
Nylon monofilament floss
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
Butlerweave Dental Floss is a nylon monofilament product, meaning a single continuous strand of polyamide polymer. Nylon is chemically stable in the mouth environment and does not degrade or leach significantly during normal flossing, which occurs for seconds per tooth. Unlike waxed floss with unknown wax composition, this nylon base is inert and not designed to dissolve or fragment during use.
The brand's record and disclosure
Butler is an established dental care manufacturer owned by Sunstar, a multinational with decades of market presence. The brand does not publicly disclose detailed material sourcing, manufacturing process, or third-party safety certifications for this product line. No recalls, lawsuits, or formal safety complaints have been recorded against Butler nylon floss in available public databases.
How it compares in its category
Standard nylon monofilament floss is the most common type globally and carries no known hazard profile distinct from competing nylon brands (Oral-B, Crest, Reach). Alternatives like silk floss or natural fiber products lack long-term safety data and may harbor bacteria if not dried properly. This product sits in the mainstream, chemically unremarkable segment of the floss market.
If you buy it
Store floss in a cool, dry place away from direct sunlight to prevent degradation of the container. Replace the spool if the nylon becomes frayed or discolored, as this signals possible microbial colonization or material breakdown. Use once daily for 30-60 seconds per tooth; no risk from frequency or duration with nylon. Discard after use; do not reuse or compost, as it will not biodegrade in typical disposal pathways.
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.”
Microplastic generation and ingestion
Nylon monofilament can shed microscopic fibers during aggressive flossing or if the strand frays. Quantity swallowed per use is minimal (micrograms), but cumulative exposure from daily use over years remains unquantified in literature. No recalls or adverse health reports have been tied to floss-derived microplastics.
Bacterial colonization on storage spool
The plastic spool housing can accumulate oral bacteria and fungi if stored in humid bathrooms and not cleaned. Risk is indirect and low if the spool is replaced every 6-12 months and kept sealed between uses. Butler does not specify antimicrobial treatment of the spool material.
Allergic reaction to nylon or additives
Nylon monofilament is hypoallergenic and widely used in medical sutures without documented sensitization. The product may contain minor slip agents or colorants, but none are disclosed by the brand. No case reports of floss-specific allergic reactions to this brand exist in public databases.
Heavy metals in dyes or coatings
Nylon floss may be dyed for visibility, but Butler does not disclose dye chemistry or testing. Dental floss is not subject to FDA premarket testing like other oral products. No heavy metal contamination has been reported or tested for in commercial nylon floss products in peer literature.
Gum trauma from defective or degraded strands
Frayed, cracked, or structurally weakened nylon can tear delicate gum tissue if used forcefully. This is a mechanical hazard tied to product age and storage conditions rather than chemical composition. Users should inspect the floss visually before each use and replace if visible damage is present.
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.