Burst Refillable Expanding Mint Dental Floss Set
Nylon dental floss with no PFAS-related disclosure from the brand.
Material as recorded is nylon dental floss, likely polyester core, which is not a material linked to PFAS. No water-repellent finish on record. Brand has no PFAS statement on record.
We flunk more products than we pass. This one earned its grade. How we grade
Material
Nylon dental floss, likely polyester core
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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What Burst Refillable Dental Floss Set is made of, ingredients and materials
Burst's dental floss is nylon monofilament, likely with a polyester core for structure. Nylon is inert in the oral cavity and does not leach into saliva during normal flossing. The 'expanding' feature means the floss widens when wet to increase contact area; this mechanical property does not introduce chemical hazards, though it may fray faster than standard floss depending on tooth geometry and user technique.
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.
Fragrance allergens (mint flavoring)
Mint-flavored floss may contain menthol or synthetic mint compounds that can trigger allergic contact dermatitis or oral irritation in sensitive individuals. This is a known but minor risk in mint-flavored oral products; discontinue if soreness or rash develops.
Microplastic shedding during use
Nylon floss degrades with friction and can shed fine fibers into the oral cavity and be swallowed. Chronic ingestion of microplastics is under study; risk is low during normal flossing but increases if floss is shredded or if users floss excessively (over 2-3 times daily).
Coating or wax additives (undisclosed)
If floss carries a wax coating, the brand does not publicly specify whether it uses natural wax, synthetic wax, or proprietary additives. Synthetic wax coatings occasionally include slip agents or stabilizers not labeled; this presents minimal risk in the mouth but adds uncertainty.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Formaldehyde / VOCs
Nylon monofilament dental floss does not typically use formaldehyde-releasing binders. No public evidence or recalls link Burst floss to formaldehyde emissions.
Source, ATSDR ↗Heavy metals
Burst floss is typically undyed or lightly colored (mint or white). No documented heavy metal contamination in dental floss products from this brand or material class has been reported.
Source, FDA ↗How is this PFAS grade calculated?
The brand's record and disclosure
Floss & Ploss (Burst's oral care line) has not published detailed safety certifications, heavy metals testing, or PFAS testing results on its floss products. The brand maintains silence on PFAS use, which is standard across most dental floss manufacturers and not unusual in this category. No major recalls or safety complaints have been documented for Burst floss products. Lack of transparency does not indicate a hazard, but limits independent verification of manufacturing practices.
How it compares in its category
Dental floss sits at the low-risk end of cosmetics because it contacts only oral mucosa briefly and is not ingested or absorbed. Most floss, including nylon types, carry similar hazard profiles. Burst's refillable model reduces plastic waste compared to single-use dispensers, though the floss material itself is unchanged. Waxed variants sometimes use synthetic waxes or natural waxes with additives; Burst's specific wax formulation is not publicly detailed.
If you buy it
Store floss in a cool, dry place away from direct heat and sunlight to prevent nylon degradation. Replace the spool every 3-6 months depending on use and visible fraying. Nylon floss does not require special care; standard flossing technique applies. If gums bleed, recede, or show sensitivity after switching, return to a gentler floss type; expanding floss may be too abrasive for compromised gingival tissue.
What is not known about PFAS in this product?
- Basis
- Model estimate, 72% confidence, not a lab result
- Lab test
- None on record for this exact product
- Brand statement
- Burst has made none
Formulations change between production runs, so check the current label. How we grade.
What are the PFAS-free alternatives to Burst Refillable Expanding Mint Dental Floss Set?
- Plant-based waxed fiber floss
- A third party reports verifying it as PFAS-free
- Fragrance allergens and sensitizers
- nylon monofilament
- The brand calls it PFAS-free, which we have not verified
- Microplastics
2 hazards checked on this product, all on its full breakdown.
- Coconut fiber-based floss
- The brand calls it PFAS-free, which we have not verified
- Microbial growth in natural fiber storage
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.