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Highlights
Summary
A multi-action shampoo for stronger, defined, and more hydrated coils, curls, and waves in one use.
Benefits
- Instantly Strong
- Infinitely Defined
- 7-Day Hydration
- Reduces breakage and protects length
- Cuts frizz in half, even in high humidity
- Instantly easier detangling and static control
- Stronger hair & less breakage
- *When N°.4CURL & * N°.5CURL are used as a system
Key Ingredients
- Patented 3D Bond Shaper™ Technology Builds disulfide bonds from 6 points in multiple directions to repair, strengthen, and define coils and curls.
- Hydra-Define Technology™ Positively charged hyaluronic acid complex neutralizes points of damage, sealing the cuticle to lock in smoothing hydration and block frizz-forming humidity.
- Natural Oil Blend Nourishing Avocado and Sunflower oils impart moisture, softness, and definition.
- No protein overload. No silicone buildup. Free of Protein, Silicones, Sulfates, SLS/SLES, Phthalates, Phosphates, MIC/MIT, and Parabens.
- Olaplex Signature Scent, Reimagined Revitalize your senses with elevated notes of crisp and invigorating Sugared Mint, complemented by a bright burst of Grapefruit Zest Ginger, and a sophisticated, grounding base of Crushed Sage.
Research Results
- 50% less frizz, even in high humidity*
- 96% agree hair was easier to detangle**
- *When N°.4CURL & * N°.5CURL are used as a system
- **Based on a 2-week 75-person consumer study.
Item 2655265
Apply to wet hair. Lather. Rinse. Follow with N°.5CURL BOND SHAPER™ CURL HYDRATING CONDITIONER or OLAPLEX mask of choice. Avoid contact with eyes.
Aqua, Sodium Cocoyl Isethionate, Sodium C14-16 Olefin Sulfonate, Cocamidopropyl Betaine, Decyl Glucoside, Cocamidopropylamine Oxide, Parfum, Acrylates Copolymer, Phenoxyethanol, Coconut Acid, Hydroxypropyl Bis-Hydroxyethyldimonium Chloride, Panthenol, Polyester-37, Glycol Distearate, Polyquaternium-11, Polyquaternium-7, Chlorphenesin, Isostearamide MIPA, Guar Hydroxypropyltrimonium Chloride, Acrylamidopropyltrimonium Chloride/Acrylamide Copolymer, Sodium Isethionate, Trisodium Ethylenediamine Disuccinate, Ethylhexylglycerin, Menthol, Menthyl Lactate, Linum Usitatissimum Seed Powder, Carthamus Tinctorius Oleosomes, Glyceryl Laurate, Salvia Hispanica Herb Extract, Glycerin, Acacia Senegal Gum, Hexyl Cinnamal, Limonene, Menthol, Citral, Sodium Hydroxide, Stearic Acid, Sodium Benzoate, Propanediol, Tetramethyl Acetyloctahydronaphthalenes, Linalool, Mentha Piperita Oil, Citronellol, Jojoba Esters, Carvone, Linalyl Acetate, Pentylene Glycol, Benzyl Alcohol, Mentha Viridis Leaf Oil, Ethyl Linoleate, Ethyl Oleate, Helianthus Annuus Seed Wax, Geranyl Acetate, Benzyl Alcohol, Eucalyptus Globulus Oil, Lactic Acid, Caprylyl Caprylate, Xylitol, Caprylic Acid, Olus Oil, Hydroxypropyltrimonium Hyaluronate, Potassium Sorbate, Camphor, Benzyl Benzoate, Beta-Caryophyllene, Geraniol, Pinene, Sodium Metabisulfite, Helianthus Annuus Extract, Persea Gratissima Oil, Rose Ketones, Anethole, Polyglycerin-3, Sorbitan Oleate Decylglucoside Crosspolymer, PB-300, Anise Alcohol, Terpineol, Alpha-Terpinene, Pentaerythrityl Tetra-Di-t-Butyl Hydroxyhydrocinnamate, Sodium Chloride, Propylene Glycol, Terpinolene, Hydroxypropylcellulose, Coumarin, Phenethyl Alcohol, Tocopherol, Benzaldehyde
This brand is excluded from most Ulta Beauty coupons.
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Questions
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Reviews
Review Snapshot
by PowerReviews
Ratings Distribution
Hair Type
Most Helpful Positive Review
Love it
honestly i was pretty skeptical about trying yet another high end curl shampoo because my hair usually just ends up feeling stripped or like a tangled mess but the olaplex n4 curl bond shaper is actually a game changer for real. i was lucky enough to have this gifted to me to try out and the first t...
Most Helpful Critical Review
Gentle cleansing but not hydrating for drier hair types
I have multi textured strands and multi curl patterned dry type 3 & 4 low porosity hair. True cleansing is imperative for any wash day to turn out good for me. Hydrating shampoos are my favorite to cycle through since clarifying all the time can mess up the moisture balance and ph of my hair at time...
299 results
Game changer
Absolutely love this product, it brought my coils back to life in one wash!


Great product!
Hair Type Wavy Hair
This shampoo made such a noticeable difference in my curls after just a few uses. It cleanses really well without stripping my hair, and my curls felt softer, more hydrated, and way less frizzy afterward. I also love that it leaves my hair feeling lightweight while still giving my curls definition and bounce. Definitely one of the best curl shampoos I've tried.
perfect for type 4 hair
Hair Type Very Curly Hair
i have 4b/c hair and it defines my coils. I do recommend pairing it with something more hydrating because my hair feels dry after constant back to back use. but using the set every once in awhile will define afro hair
Olaplex stays in my routine !
Hair Type Very Curly Hair
This product was given in exchange for an honest review. The Olaplex line has been in my vanity for years. Now that there's a curly line, I feel like I'm in heaven. The shampoo cleansed my scalp thoroughly without stripping my curls or leaving them dry. My hair was noticeably softer, stronger and less frizzy. I also experienced less shedding and more curl definition overall. The formula feels luxurious, and a little goes a long way. I would absolutely recommend to a friend. It's worth it for heat damaged or color treated curls needing extra repair and strength


nice
Hair Type Wavy Hair
I've tried a lot of curl shampoos and this one actually surprised me. My curls felt noticeably softer, more hydrated, and easier to detangle after just one wash. It cleans without leaving my hair feeling stripped, which is hard to find with curl products. I also noticed less frizz and better curl definition, especially on day 2-3 hair. The scent is fresh and luxe without being overpowering. If you have waves, curls, or coils and struggle with dryness, this feels like a good balance between cleansing and moisture. A little goes a long way too, so the bottle should last. Definitely worth trying if your curls need hydration + strength. ✨