Reach · Dental Floss
Reach Ultraclean Gentle Gum Care Expanding Floss – Woven Non-Waxed
Lower PFAS concern; simple woven nylon floss with no water-repellent or non-stick treatments documented.
Reach's non-waxed expanding floss is a basic woven nylon dental product with no disclosed treatments that commonly introduce PFAS (e.g., water-repellency, grease-resistance). The brand makes no PFAS claims either way.
Shop Reach on Amazon →Material
Woven nylon fiber, non-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
This floss is woven nylon fiber without wax coating, meaning it relies on the nylon structure itself for cleaning action rather than a slippery surface treatment. Nylon is a synthetic polymer with low toxicity in oral use and does not leach significant chemicals at mouth temperature and saliva pH. The "expanding" feature typically refers to the floss widening slightly when moistened, which enhances contact with tooth surfaces; this is a physical property of the fiber construction, not a chemical additive.
The brand's record and disclosure
Reach (owned by Johnson & Johnson) does not publicly disclose PFAS testing or stance on fluorinated compounds in floss products, which is consistent with industry-wide silence on this issue. The brand has no documented recalls for chemical contamination in floss products and maintains standard oral-care product safety certifications. Johnson & Johnson has faced scrutiny on other product lines regarding talc and other issues, but dental floss has not been a focus of major safety controversies.
How it compares in its category
Unwaxed nylon floss sits at the simpler end of the category; waxed varieties add paraffin or similar lubricants that increase per-use chemical load slightly. Expanding floss (also called "expandable" or "tape") is marketed for wider interdental spaces and is comparable in safety profile to standard woven nylon. Silk floss alternatives exist but are less durable; most modern floss products use synthetic fibers similar to this one.
If you buy it
Use standard flossing technique (gentle sliding between teeth and along the gumline) to avoid gum damage; the expanding structure is durable but not indestructible. Replace the spool when the floss becomes frayed, stretched, or visibly degraded, typically every 2-3 months with daily use. Store in a cool, dry place to prevent humidity-induced fiber softening. If gums bleed excessively or show signs of irritation, discontinue and consult a dentist; this is rarely a product issue but warrants professional evaluation.
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 degradation and microfiber shedding
Worn or repeatedly flexed floss can shed microscopic nylon fibers into the mouth. Oral ingestion of such fragments is generally considered low-risk due to the small quantity and non-bioaccessibility of nylon, but no long-term studies on chronic floss fiber ingestion exist.
Dye or colorant contamination
Reach does not publicly disclose colorants used in the floss fiber or packaging. Standard food-contact approved dyes are assumed, but no independent testing or ingredient disclosure is available for this specific product.
Gum or mouth tissue irritation
Any floss can cause mechanical irritation or micro-abrasion if used aggressively or if existing gum disease is present. The non-waxed nylon surface is slightly rougher than waxed alternatives, which may increase friction in sensitive individuals, but this is product-use dependent, not inherent toxicity.
Allergic reaction to nylon
Nylon allergy is extremely rare in medical literature and not documented in oral floss users. Contact dermatitis from floss is nearly always due to a coating or dye, not the nylon fiber itself.
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.