Kosas · Waterproof Mascara
Kosas - Soulgazer Lengthening Mascara + Lash Serum in 1 for Sensitive Eyes | Hypnotize - black
Lower-concern typical mascara; no known PFAS red flags, but brand offers no transparency.
Kosas Soulgazer is a standard liquid mascara, serum hybrid with no disclosed PFAS-containing ingredients and no known waterproofing chemistry requiring fluorochemicals. The brand makes no PFAS claims and provides no third-party verification, so full ingredient transparency remains unavailable to consumers.
Shop Kosas on Amazon →Material
liquid mascara and serum formulation, typical pigments and polymers
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
Kosas Soulgazer is a dual-phase liquid mascara plus conditioning serum in one formulation, typical of modern waterproof mascaras that use film-forming polymers (usually acrylates or silicones) and iron oxides or synthetic organic pigments for color. The 'sensitive eyes' claim suggests reduced irritants like fragrance and formaldehyde releasers, though Kosas does not publish full ingredient disclosure online. Waterproof mascaras rely on water-resistant resins and emulsifiers rather than volatile chemical linkers, making them lower-risk than some powder formulations for volatile organic compound off-gassing.
The brand's record and disclosure
Kosas (owned by Estee Lauder) positions itself as a clean-beauty brand with some commitments to ingredient transparency, but does not publish detailed safety certifications or third-party testing reports for this product. The brand has not faced major recalls or documented heavy-metal contamination cases in recent years. However, Kosas does not voluntarily disclose PFAS testing or commit to PFAS-free formulations, a gap common across mid-tier cosmetics brands but increasingly noted by consumers.
How it compares in its category
Waterproof mascaras in the 'sensitive' niche often overlap in safety profile because water-resistant chemistry limits options for preservative systems and pigment carriers. Kosas Soulgazer sits in the mid-range of transparency and claims; it avoids the lowest-cost pigment sources and preservatives associated with heavy metals or formaldehyde releasers, but lacks the third-party certifications (e.g., EWG Verified, Leaping Bunny) that distinguish higher-assurance competitors. The addition of serum compounds is common among premium waterproof mascaras and does not introduce novel hazards if formulated correctly.
If you buy it
Patch-test on the inner arm or eyelid (48 hours) before full use if you have known sensitivities to preservatives or fragrance. Remove with a proper makeup remover or oil-based cleanser nightly; waterproof mascaras left on can increase bacterial growth risk and eye irritation over time. Replace every 3 months or if you notice clumping, odor, or eye discomfort. Store in a cool, dry place away from direct heat or humidity, which can degrade serum components and promote microbial contamination.
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.”
Heavy metals in pigments (iron oxide, synthetic colorants)
Iron oxides and FD&C synthetic dyes used in waterproof mascaras are FDA-approved colorants with low lead or cadmium risk if sourced from reputable suppliers. No recalls or contamination reports exist for Kosas mascara pigments; however, brand does not publish third-party pigment testing.
Formaldehyde releasers and preservatives
The 'sensitive eyes' formulation suggests avoidance of formaldehyde-releasing preservatives (e.g., DMDM hydantoin), but Kosas does not publicly list preservative system details. Waterproof mascaras typically use parabens, phenoxyethanol, or milder preservatives; none are inherently hazardous at cosmetic use levels, but patch-testing is prudent for sensitive eyes.
1,4-dioxane (contaminant in emulsifiers and surfactants)
Waterproof mascara formulations rely on emulsifiers that may contain trace 1,4-dioxane as a manufacturing byproduct. Kosas has not disclosed 1,4-dioxane testing or removal protocols. Exposure via eyelid application is minimal compared to ingested or inhaled routes, but brand transparency here is absent.
Fragrance allergens and sensitizers
Even 'fragrance-free' or 'for sensitive eyes' mascaras may contain masking fragrances or essential oils to improve consumer experience. Kosas does not itemize fragrance components; common sensitizers include limonene, linalool, and benzyl salicylate. Individuals with fragrance sensitivity should request full ingredient list from retailer or brand.
Bacterial colonization from improper removal or storage
Waterproof mascaras are prone to bacterial growth if removed incompletely or stored in warm, humid bathrooms. This is a use-dependent risk, not a manufacturer defect, but the serum component may provide a nutrient-rich environment if water contaminates the tube during application.
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.
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.