Hair / Olaplex – No.4 Shampoo
Olaplex No. 4 Bond Maintenance Shampoo
Olaplex No. 4 Bond Maintenance Shampoo is a concentrated wash formula. The current product is positioned for medium-to-coarse hair, making texture and cleansing preferences useful comparison points.
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Hair feeling dry, stressed, or harder to manage?
OLAPLEX Nº.4 Bond Maintenance® Shampoo is a highly concentrated cleansing formula developed to remove daily impurities while supporting stronger-looking, softer, and more manageable hair. The brand positions it to help address everyday damage, replenish hydration, reduce the appearance of frizz, and improve shine. The current formula is designed particularly for medium, thick, and coarse hair across straight, wavy, curly, and coily patterns. Results depend on hair condition, texture, and the rest of the routine.
Educational notes only. Individual results vary. This is not medical advice, and we do not promise outcomes.
Key ingredients and roles
- Bis-Aminopropyl Diglycol Dimaleate
The signature ingredient associated with OLAPLEX Bond Building Technology™. The brand uses it to support and reinforce the internal bonds that contribute to hair structure and resilience.
- Coconut Oil-Derived Cleansing Blend
A combination of sulfate-free cleansing agents designed to produce a rich lather and remove everyday impurities while helping hair and scalp retain a hydrated feel.
- Panthenol and Sodium Hyaluronate
Moisture-supporting ingredients included to help hair feel softer, smoother, and better conditioned after cleansing.
- Botanical Extracts and Conditioning Oils
The current formula includes ingredients such as sunflower, apricot kernel, and argan oils, along with botanical extracts. They support the formula’s nourishing feel and help enhance softness and shine. The formula is listed as vegan, color-safe, dermatologist tested, and suitable for chemically treated hair. It is formulated without SLS/SLES sulfates, phthalates, MIC/MIT, or parabens. It contains fragrance, so individual scent preference and sensitivity should be considered. Ingredient lists can change. Always verify the current packaging before use.
Ingredient roles are educational summaries from brand and listing language. Always verify the current Supplement Facts panel on the store page or official brand site.
Source: OLAPLEX official product page
Olaplex No. 4 Bond Maintenance Shampoo — Review: cleansing for a conditioning wash routine
Olaplex No. 4 Bond Maintenance Shampoo is a concentrated wash formula. The current product is positioned for medium-to-coarse hair, making texture and cleansing preferences useful comparison points.
This editorial review evaluates published product information. It is not a hands-on test or a report of customer results.
Affiliate disclosure: BilloraCare may earn a commission from purchases through our links, at no extra cost to you.
Quick Verdict
Consider it if you want a shampoo with a conditioning emphasis. Judge cleansing comfort and how your hair feels between washes; abundant foam alone is not a measure of better care.
What to Consider
It contains fragrance. No. 4FINE and other No. 4 variants are separate products, so match the listing to this review. Cost per bottle can be misleading when sizes differ, and advertised application counts are not a guarantee of how long yours will last.
How to Use
Work a small amount between your hands, apply to wet hair, lather and rinse thoroughly. Follow with conditioner as needed and follow the bottle directions.
Quick Question
Does the shampoo replace No. 3?
No. Shampoo serves the cleansing step; No. 3 is a separate pre-shampoo treatment. You can choose a shampoo without committing to every numbered product.
Our Take
Choose according to the specific formula, texture preference and how it fits your existing routine. Compare the selected size and delivered price; no complete collection is required.
Official product information — OLAPLEX. Reviewed September 26, 2026.