PFAS score
Kosas · Waterproof Mascara
Kosas Soulgazer Lengthening + Lifting Peptide Mascara – Smudge-proof,
Skip until brand discloses or third-party tests; waterproof cosmetics often contain PFAS but Kosas provides no transparency.
Kosas markets this mascara as 'smudge-proof,' a claim typically achieved via water-resistant coatings that may contain PFAS. The brand makes no public statement on PFAS presence, absence, or testing. No third-party certification (EWG Verified, MADE SAFE, etc.) is visible for this product, leaving consumers without reliable assurance.
The safe swap
Burt's Bees
Burt's Bees 100% Natural Nourishing Mascara, Black Brown
75/100 safety
Still want this one anyway? Check the price on Amazon. We’d swap it.
Material
Peptide complex with smudge-proof (likely silicone or wax-based) waterproof binder
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Waterproof / stain-resistant treatment
water-repellent coating treatments have historically used PFAS.
Category baseline
cosmetics is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 45% 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 Waterproof Mascara
Burt's Bees
100% Natural Nourishing Mascara, Black Brown
Wax, pigments, natural oils (typical mascara base)
Lower concern, conventional mascara formula with no known PFAS drivers, but zero transparency from brand.
⚠Risky category by default
RMS Beauty
Volumizing Mascara
Wax, resin, and pigment base (typical mascara formulation)
Lower concern; standard mascara formula unlikely to contain PFAS, but brand makes no explicit commitment.
⚠Risky category by default
Tarte
Travel-size Tartelette
Powdered eyeshadow palette with talc or mica base
Lower concern for PFAS, powder cosmetics rarely need Teflon-family coating, but Tarte makes no public PFAS disclosure.
⚠Risky category by default
More waterproof mascara 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.