What it is: A multi-action shampoo for stronger, defined, and more hydrated coils, curls, and waves in one use.Hair Texture: Wavy, Curly, and CoilyHair Type: Fine, Medium, and ThickHair Concerns:- Curl-Enhancing- Damage, Split Ends, and Breakage- DrynessKey Benefits: - Instantly strong, infinitely defined, and seven-day hydrated curls- Reduces breakage and protects length- Cuts frizz in half, even in high humidityHighlighted Ingredients:- Patented 3D Bond Shaper Technology: Builds disulfide bonds to repair, strengthen, and define coils and curls.- Hydra-Define Technology: Neutralizes damage, seals cuticles to lock hydration, and blocks humidity.- Natural Oil Blend: Nourishing avocado and sunflower oils add moisture, softness, and definition.Ingredient Callouts: Free of parabens, phthalates, mineral oil, and sulfates SLS & SLES. It is also cruelty-free.What Else You Need to Know: No.4 CURL Shampoo works on a molecular level to strengthen, define, and hydrate curls and coils, cutting frizz in half and protecting length over time. The silky cream-gel prevents tangles and removes buildup without stripping for seven-day hydrated curls. This shampoo is great for all porosity levels and is color safe.Fragrance Description: The Olaplex Signature Scent, Reimagined: Revitalize your senses with elevated notes of crisp and invigorating sugared mint complemented by a bright burst of grapefruit zest and ginger and a sophisticated, grounding base of crushed sage.Clinical Results: When N°.4CURL and N°.5CURL are used as a system:- 50% less frizz, even in high humidityBased on a 2-week, 75-person consumer study:- 96% agree hair was easier to detangleIn studies:- 7 days of hydrated curls- Stronger hair and less breakage- Defined curl pattern
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What it is: A multi-action shampoo for stronger, defined, and more hydrated coils, curls, and waves in one use.Hair Texture: Wavy, Curly, and CoilyHair Type: Fine, Medium, and ThickHair Concerns:- Curl-Enhancing- Damage, Split Ends, and Breakage- DrynessKey Benefits: - Instantly strong, infinitely defined, and seven-day hydrated curls- Reduces breakage and protects length- Cuts frizz in half, even in high humidityHighlighted Ingredients:- Patented 3D Bond Shaper Technology: Builds disulfide bonds to repair, strengthen, and define coils and curls.- Hydra-Define Technology: Neutralizes damage, seals cuticles to lock hydration, and blocks humidity.- Natural Oil Blend: Nourishing avocado and sunflower oils add moisture, softness, and definition.Ingredient Callouts: Free of parabens, phthalates, mineral oil, and sulfates SLS & SLES. It is also cruelty-free.What Else You Need to Know: No.4 CURL Shampoo works on a molecular level to strengthen, define, and hydrate curls and coils, cutting frizz in half and protecting length over time. The silky cream-gel prevents tangles and removes buildup without stripping for seven-day hydrated curls. This shampoo is great for all porosity levels and is color safe.Fragrance Description: The Olaplex Signature Scent, Reimagined: Revitalize your senses with elevated notes of crisp and invigorating sugared mint complemented by a bright burst of grapefruit zest and ginger and a sophisticated, grounding base of crushed sage.Clinical Results: When N°.4CURL and N°.5CURL are used as a system:- 50% less frizz, even in high humidityBased on a 2-week, 75-person consumer study:- 96% agree hair was easier to detangleIn studies:- 7 days of hydrated curls- Stronger hair and less breakage- Defined curl pattern
SKU
2-P525778
Brand
Olaplex
Category
beauty / hair-care
Variants
1
Customer reviews
4.0
verified purchase
Great for product buildup
This shampoo is perfect for wash day! It removes all the product buildup and leaves my scalp and hair feeling really clean. After using it, my hair does require a lot of hydration because it can feel a little dry, especially since I have fine hair. But for the purpose of removing product buildup and getting my scalp and hair really clean, it works great and does exactly what it’s supposed to do!
9/8/2026
5.0
verified purchase
I love
I really liked this Olaplex shampoo for curly hair. It left my hair feeling clean, soft, and hydrated without making it feel heavy. After washing, my hair looked healthier and my curls looked nice and defined. I also noticed that my hair felt much smoother and easier to manage. I like that it gives my hair moisture while still keeping the natural movement of my curls. Overall, I had a really good experience using this shampoo and I would definitely keep using it as part of my hair care routine. It left my hair looking and feeling really nice, which is exactly what I look for in a shampoo for curls.
received as a part of an educational promotion.
9/4/2026
5.0
verified purchase
I was very excited to use this curly hair shampoo, because I frequently deal with my naturally curly hair being too frizzy to be manageable. This shampoo truly made my hair so much more manageable and I didn’t experience nearly as much frizz as I normally do! This product also left my hair feeling and looking so clean and sleek! I was happy that it didn’t make my hair oily.
9/3/2026
5.0
verified purchase
More defined curls with less frizz
I’ve been using the OLAPLEX Nº.4 Curl Bond Shaper Hydrating Curl Shampoo, and I really like the results. My hair is naturally wavy/curly but tends to get frizzy and lose definition. After using this shampoo, my curls looked noticeably more defined and separated, while my hair still felt soft and hydrated. It cleanses well without leaving my hair feeling stripped or weighed down. I especially love how much more visible my natural curl pattern is after washing!
8/31/2026
5.0
verified purchase
Hydrated from the first use
From the very first use, I noticed my hair felt much more hydrated and had less frizz. Once it dried, it still felt soft, moisturized, and looked more defined. I really loved how my hair felt after using it.
8/31/2026
5.0
verified purchase
Olaplex doing right by my hair again! My curls are so springy & full of life.
The N°4 Curl Bond Shaper Hydrating Curl Shampoo is one of my best friends now.
Scent wise this smells like other Olaplex shampoos and conditioners I have tried and I love the consistency in scent across the types I have tried. Very pleasant citrusy scent.
This shampoo lathers really well, so well you can just tell it's doing double duty, it is cleaning and moisturizing at the same time. I love the rich lather I get from this.
I usually let mine sit for just a minute, do my scalp massager with the shampoo in, rinse, then condition using the conditioner that goes with this shampoo.
My curls are healthier, more moisturized, less frizzy, shiner, and they feel better. Love this line and highly recommend it for coily curls! Thanks Olaplex!
8/31/2026
5.0
verified purchase
10/10
I love how gentle and hydrating this shampoo feels. It cleanses my hair without leaving it dry or stripped, while helping my natural waves and curls look softer, smoother, and more defined. It’s a great addition to my hair care routine.
8/27/2026
5.0
verified purchase
Great for curly hair
Love this shampoo! This is my go to shampoo and it makes my curls so healthy and hydrated. I will never switch to another shampoo again. This shampoo has to be the best curly hair shampoo for my hair type and I have 3c hair .
8/27/2026
5.0
verified purchase
I’ve been standardizing my hair care around bond repair for a while, and adding the Olaplex No. 4CURL Bond Shaper Hydrating Curl Shampoo to my wash routine has been such a game changer. Curl shampoos often leave my hair feeling either stripped dry or coated in heavy residue, but this one hits the exact sweet spot.
It lathers up so nicely for a sulfate-conscious curl shampoo, deeply cleanses my scalp, and leaves my curls feeling super soft, defined, and bouncy before I even apply conditioner. You can genuinely feel the bond repair technology working—my hair looks healthier, has noticeable shine, and feels strong after every wash. If you have textured hair or curls that need both serious hydration and structural repair, this bottle is worth every penny!
8/27/2026
5.0
verified purchase
I really like this shampoo! it cleans my hair without making my curls feel dry or stripped, and they feel super soft and hydrated after. It also lathers way better than I expected and a little goes a long way. My curls have been looking more defined and less frizzy since I started using it, defintely one I’d buy again
