GUM Expanding Dental Floss Waxed Woven Floss
Low PFAS concern; standard waxed floss with no known PFAS risk.
GUM Expanding Dental Floss is a traditional waxed nylon product with no disclosed chemical treatments associated with PFAS. No public evidence of Teflon-family coating or water-repellent finishes.
We flunk more products than we pass. This one earned its grade. How we grade
Material
nylon fibers, wax coating
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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What GUM Expanding Dental Floss Waxed Woven is made of, ingredients and materials
GUM Expanding Dental Floss is constructed from nylon fibers coated with wax, a conventional formulation for dental floss. Nylon is a synthetic polymer that does not break down in the mouth during brief contact and is not absorbed. The wax coating (typically paraffin, beeswax, or palm-derived wax in mainstream products) aids glide and does not leach into saliva in meaningful amounts during the seconds-long contact of normal use. Neither nylon nor standard floss waxes are classified as oral toxicants by regulatory bodies.
What’s concerning
Category baseline
The starting point for this type of product, before anything specific to this product is counted.
No PFAS disclosure
No public statement from the brand about PFAS in this product.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Fragrance allergens (if scented variant)
Standard GUM waxed floss does not list flavor or fragrance additives in public product descriptions. If a flavored variant (mint, etc.) is used, fragrance compounds are typically at trace levels in oral floss and are not ingested in meaningful quantity.
Nylon microfiber shedding
Nylon floss may shed microscopic fibers during use, but these are not absorbed orally and pass through the digestive system without absorption if swallowed in tiny amounts. No regulatory agency has flagged dental floss as a microplastic exposure route of concern.
Wax composition and purity
Paraffin and beeswax used in dental floss are food-grade or cosmetic-grade materials with long history of oral contact. No heavy metal or pesticide contamination has been documented in mainstream dental floss waxes.
Dyes or colorants in floss
GUM floss may be white or lightly colored; any colorants are FDA-approved for oral products and present in trace amounts. No azo dyes or toxic pigments are documented in standard dental floss formulations.
The full breakdown
The brand's record and disclosure
Sunstar GUM is a well-established oral care brand with no documented product recalls or safety violations specific to this floss in public records. The brand does not publicly disclose detailed ingredient sourcing or manufacturing certifications beyond standard regulatory compliance. No independent testing controversies or undisclosed harmful additives have been reported for this product line. The brand's silence on PFAS does not contradict the low-concern PFAS assessment for this product type.
How it compares in its category
Waxed nylon floss is the most common floss type globally and carries minimal established hazard compared to alternatives. Unwaxed floss, silk floss, and dental tape offer similar safety profiles with marginal differences in material. Some specialty flosses add charcoal or tea tree oil with unverified benefits but no documented safety concerns in this application. GUM Expanding Floss is a middle-of-market product with no distinguishing safety advantage or disadvantage versus leading competitors.
If you buy it
Use as directed, wind around fingers and slide gently between teeth daily. Nylon floss does not degrade from saliva or normal moisture and can be stored in a dry container. Replace the floss spool when noticeably frayed or if wax coating becomes dull; standard replacement is every 3-6 months depending on frequency of use. Do not swallow floss; spit it into the trash after use. If you have latex sensitivity, confirm this product contains no latex components (it does not in standard formulation, but always verify packaging if allergic).
What we don’t know
- Basis
- Model estimate, 72% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- GUM has made none
Formulations change between production runs, so check the current label. How we grade.
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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.