No 4 Olaplex Bond Maintenance Shampoo
Low-medium risk. Rinse-off formula without flagged risk but no transparency.
Olaplex No. 4 is a rinse-off shampoo without known PFAS use, Teflon-family coating coatings, or water or stain repellency treatments. The brand makes no PFAS-free claims or third-party verification. Rinse-off cosmetics carry lower PFAS risk than leave-ons, but full transparency would strengthen confidence.
We flunk more products than we pass. This one earned its grade. How we grade
Material
aqueous shampoo solution with proprietary bond-building technology
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
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What No 4 Olaplex Bond Maintenance Shampoo is made of, ingredients and materials
Olaplex No. 4 is an aqueous shampoo solution built around the brand's proprietary bis(monoacylglycero)phosphorodithioate chemistry, designed to repair broken disulfide bonds in damaged hair. Like most commercial shampoos, it contains surfactants (anionic and/or amphoteric), conditioning agents, and preservatives to maintain stability and prevent microbial growth during storage and use. The formula is rinsed off completely after application, which substantially reduces dermal exposure to any problematic residues compared to leave-on products.
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 and undisclosed components
Olaplex does not itemize fragrance ingredients or allergens on product labeling or online. Fragrance blends are legally exempted from full disclosure in most jurisdictions, creating a hidden allergen risk for sensitive consumers; contact dermatitis or respiratory irritation is uncommon but documented in some users of premium shampoos.
Eye and mucous membrane irritation
As a shampoo, No. 4 contains surfactants designed to cleanse; contact with eyes can cause temporary stinging or redness regardless of brand, particularly if left in contact for more than a few seconds. Rinsing promptly eliminates this risk.
Scalp irritation or allergic contact dermatitis
Any shampoo can trigger contact dermatitis in individuals with sensitive scalp or allergies to specific surfactants or botanical extracts; Olaplex No. 4 has no elevated complaint history, but undisclosed ingredients limit predictability for susceptible users.
What’s reassuring
Base material not linked to PFAS
The main material recorded for this product is not one associated with PFAS.
Formaldehyde / VOCs
No public testing or recalls have flagged formaldehyde-releasing preservatives (e.g., imidazolidinyl urea, dmdm hydantoin) in No. 4; typical shampoo preservative systems are well-tolerated at rinse-off exposures, but ingredient transparency from Olaplex would confirm this assumption.
Source, ATSDR ↗Heavy metals
No independent testing or regulatory warnings have documented lead, cadmium, or arsenic in Olaplex No. 4 or similar premium shampoos; this hazard is more relevant to pigmented cosmetics (mascaras, eyeshadows) than colorless or lightly tinted shampoo solutions.
Source, FDA ↗How is this PFAS grade calculated?
The brand's record and disclosure
Olaplex has not published a detailed ingredients transparency report or fragrance allergen disclosure, and does not volunteer PFAS testing data or third-party certifications (e.g., EWG Verified, Leaping Bunny). The brand markets a proprietary technology rather than clean-slate minimalism, which limits independent scrutiny of the full formula. No major recalls, contact dermatitis clusters, or regulatory warnings specific to No. 4 have been documented in public records. The brand's silence on PFAS and chemical disclosure reflects a broader industry norm rather than an unusual red flag.
How it compares in its category
Olaplex No. 4 sits in the premium, salon-distribution shampoo tier, with a higher price point than mass-market alternatives (Pantene, Garnier) but similar or less transparent ingredient disclosure than indie or certification-focused brands (Acure, Burt's Bees). It competes on bond-repair efficacy claims rather than clean-ingredient positioning, so consumers should not expect the chemical minimalism of a natural or organic product. Most shampoos in this segment carry identical unresolved concerns around fragrance opacity and preservative necessity.
If you buy it
Use only as directed, apply to damp hair, lather, rinse thoroughly with water, and do not leave on skin or in eyes. Store in a cool, dry place and keep the bottle cap sealed to prevent bacterial or mold contamination; discard if you notice separation, odor change, or visible particles. Discontinue use immediately if itching, redness, or burning occurs; these signs suggest contact sensitivity to surfactants or fragrance components. A 8-10 oz bottle used 3-4 times weekly typically lasts 6-8 weeks; replace once empty rather than adding water or mixing with other products.
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
- Olaplex has made none
Formulations change between production runs, so check the current label. How we grade.
More shampoo 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.