Isodent · Dental Floss
3D Dental Dental Floss, Unwaxed Refill, 200 yds, 1/Pk, PR130 | Frontier Dental
Lower PFAS concern, unwaxed nylon floss has no typical driver for PFAS, though brand provides no explicit disclosure.
This is unwaxed nylon dental floss with no coating that would typically require PFAS treatments (wax, water repellency, or nonstick finish are common PFAS vectors). Nylon monofilament itself is not a known PFAS application. The brand makes no PFAS claims, positive or negative, which is standard for dental floss.
Shop Isodent on Amazon →Material
Nylon monofilament (unwaxed)
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 nylon monofilament dental floss without wax coating. Nylon is a synthetic polymer (polyamide) that does not leach monomers or plasticizers under normal oral use because floss remains at body temperature and is not heated. Unwaxed nylon floss eliminates the variable of wax composition (which can contain stearic acid, carnauba, or synthetic derivatives) that some consumers prefer to avoid. The 200-yard refill format is loose material, not packaged in a dispenser, reducing plastic waste and eliminating concern about off-gassing from a spool casing.
The brand's record and disclosure
Isodent is a smaller dental supply brand without prominent public safety certifications or third-party testing disclosures listed in mainstream safety databases. No product recalls or safety complaints specific to this floss are established in FDA or public records. The brand does not provide explicit statements about material sourcing, manufacturing standards, or chemical screening, which is typical of budget dental floss lines but limits transparency. No controversies or litigation involving this brand are on record.
How it compares in its category
Unwaxed nylon floss is a conventional category baseline; waxed alternatives add coating variables (wax type, additives) that unwaxed versions sidestep entirely. Silk floss and Teflon-type coating (Teflon) floss are premium alternatives; silk is natural but more expensive, and Teflon-type coating has its own manufacturing scrutiny. Most dental professionals recommend nylon and Teflon-type coating as functionally equivalent for cleaning. This product's 200-yard refill bulk format is standard for budget and eco-conscious consumers compared to pre-dispensed cartridge brands.
If you buy it
Store the refill in a dry environment to prevent mold growth if the package is not sealed. Use once daily or as directed by your dentist; replace the product if it becomes frayed, discolored, or develops odor. Unwaxed nylon can feel slightly coarser than waxed variants, so adjust technique to avoid gum irritation. No special precautions required beyond standard flossing practice; this material poses no heat-related or ingestion hazards under normal use.
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.”
Nylon monomer leaching
Nylon monofilament does not release caprolactam (its primary monomer) during room-temperature oral use. No established mechanism or evidence of leaching under normal flossing conditions.
Wax-derived contaminants
This unwaxed product carries no wax layer; hazard is eliminated by design. Waxed floss can contain stearic acid, dyes, or synthetic additives, but this variant avoids that variable.
Bacterial or mold colonization
Bulk unwaxed floss stored in humid environments or opened packages may develop microbial growth over months. Proper dry storage mitigates this standard risk for any loose dental floss.
Allergic sensitivity to nylon or dyes
Nylon is hypoallergenic; no dyes or coatings are typical in unwaxed monofilament. Individuals with synthetic polymer sensitivities are rare and would be better served by silk, but no established allergenicity is documented for this material in oral contact.
Gum trauma from coarse texture
Unwaxed nylon is less slippery than waxed alternatives and may cause minor gum irritation if technique is aggressive or if the user has sensitive gingival tissue. This is a usage issue, not a chemical hazard, and is preventable with gentle application.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 78% 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.