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Highlights
Summary
This moisturizing leave-in provides instant results and continuous repair and protection from cortex to cuticle. No.5LEAVE-IN™ immediately seals split ends and promotes visibly healthier hair after one use. Go beyond hydration with OLAPLEX Bond Building Technology™ and High-Adhesion Sealing Complex.
Benefits
- Instantly hydrate, soften, and detangle
- Immediately seal split ends
- Continuously repair and protect
Research Results
- Revives hair health leaving it softer, hydrated, and healthier-looking
- 12x more moisture after one use*
- Up to 88% split-end sealing after one use*
- Reduces breakage by 81%*
- Heat protection up to 450°F/232°C
- Vegan. Color-safe.
- *As tested in a clinical facility using curly tresses.
Key Ingredients
- HIGH-ADHESION SEALING COMPLEX: Immediately and continuously mends split ends.
- HYDRAMINO REPLENISHING BLEND: Provides hydration, conditioning, detangling, and shine.
- FUTURE DAMAGE SHIELD: Helps repair and prevent damage from styling and heat up to 450°F.
- OLAPLEX BOND BUILDING TECHNOLOGY™: Re-links the disulfide bonds that give hair its strength and structure.
Item 2660572
- Apply 1-2 pumps to clean, damp hair. Add more as needed. 2. Follow with your preferred stylers. Fine Hair: Begin with 1 pump. Medium to Coarse Hair: Begin with 2 pumps.
Water/Aqua/Eau, Cetearyl Alcohol, Astrocaryum Murumuru Seed Butter, Propanediol, Behentrimonium Chloride, Glycerin, Cetyl Alcohol, Isoamyl Laurate, Squalane, Bis-Aminopropyl Diglycol Dimaleate, Brassicyl Valinate Esylate, Cetyl Esters, Pentylene Glycol, Phenethyl Benzoate, Brassica Campestris/Aleurites Fordi Oil Copolymer, Hydroxypropyl Guar Hydroxypropyltrimonium Chloride, Caprylic/Capric Triglyceride, Cetrimonium Chloride, Caesalpinia Spinosa Gum, Fructooligosaccharides, Beta Vulgaris (Beet) Root Extract, Sodium PCA, Hydroxypropyl Starch Phosphate, Guar Hydroxypropyltrimonium Chloride, Sodium Lactate, Hydrogenated Ethylhexyl Olivate, Calcium Gluconate, Argania Spinosa Kernel Oil, Caprylyl Glycol, Cocos Nucifera (Coconut) Oil, Panthenol, Arginine, Ethylhexylglycerin, Oryza Sativa (Rice) Bran Extract, Sodium Phytate, Aspartic Acid, Potassium Lactate, Ximenia Americana Seed Oil, PCA, Hydrogenated Olive Oil Unsaponifiables, Butylene Glycol, Lactic Acid, Raphanus Sativus (Radish) Seed Extract, Octyldodecyl Oleate, Octyldodecanol, Helianthus Annuus (Sunflower) Extract, Propylene Glycol, Glycine, Citric Acid, Alanine, Algin, Coco-Glucoside, Sorbitan Oleate, Serine, Tocopherol, Rosmarinus Officinalis (Rosemary) Leaf Extract, Valine, Carrageenan, Chitosan, Xanthan Gum, Isoleucine, Proline, Threonine, Histidine, Phenylalanine, Magnolia Officinalis Bark Extract, Betula Alba Bark Extract, Crambe Maritima Extract, Ulmus Fulva Bark Extract, Caesalpinia Spinosa Fruit Extract, Sodium Hyaluronate, Hydrolyzed Ceratonia Siliqua Seed Extract, Zea Mays (Corn) Starch, Helianthus Annuus (Sunflower) Sprout Extract, Polyquaternium-7, Sodium Hydroxide, Phenoxyethanol, Sodium Benzoate, Potassium Sorbate, Fragrance (Parfum), Hexyl Cinnamal, Limonene, Citral, Linalool, Citronellol.
Ingredients are subject to change. For the most current ingredient list, please consult the product packaging of the item you received
This brand is excluded from most Ulta Beauty coupons.
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Reviews
Review Snapshot
by PowerReviews
Ratings Distribution
Hair Type
Most Helpful Positive Review
I would buy this product again!
When it comes to hair care, finding the perfect product for wavy and curly hair can feel like discovering a rare gem. If you've been on the hunt for a leave-in conditioner that hydrates, smooths frizz, and leaves your curls looking and feeling their best, the Olaplex No. 5 Moisturize and Mend Leave-...
Most Helpful Critical Review
It's ok but there's better ones out there.
I had high hopes for this leave-in conditioner, especially with all the promises of multi-level repair, hydration, and split-end mending. And while it does deliver on a few things, I'm honestly left feeling a little underwhelmed for the price and hype. First, the good: It definitely made my hair fe...
426 results
Very nice lightweight formula
Hair Type Wavy Hair
This olaplex leave in conditioner is so good! I've been using it for a few weeks now and it adds such nice moisture and manageability! I love the scent too, it's so fresh and clean! One pump is more than enough for my fine hair, I really love it. This product was provided in exchange for my honest opinion

Hydrating, clean, effortless care
Hair Type Wavy Hair
I've been adding this leave-in conditioner to my routine lately, and honestly, it's been a solid upgrade. It has a smooth, lightweight texture that doesn't leave my hair feeling greasy or weighed down, which is a big plus. Just a small amount after towel-drying makes my hair feel softer, more hydrated, and noticeably less frizzy. What I like most is that it doesn't try too hard. The scent is clean and subtle—not overpowering or overly perfumed—just a fresh, slightly warm smell that works for everyday use. It gives my hair a more polished, healthy look without making it seem like I spent a ton of time on it. It's also helped a lot with dry ends and rough texture. My hair feels a lot easier to manage and doesn't feel brittle like it sometimes does, especially during the warmer months or after using styling products. Overall, it's a really good product if you want something simple that works, feels high-quality, and doesn't overdo it. Easy to use, looks good, and gets the job done without fuss. This product was provided for promotional purposes in exchange for my honest review
It's ok but there's better ones out there.
Hair Type Wavy Hair
I had high hopes for this leave-in conditioner, especially with all the promises of multi-level repair, hydration, and split-end mending. And while it does deliver on a few things, I'm honestly left feeling a little underwhelmed for the price and hype. First, the good: It definitely made my hair feel softer. Detangling was a little easier, and my ends did look a bit healthier (at least temporarily). I also appreciate that it offers heat protection up to 450°F, since I'm constantly using hot tools. Now here is where it fell short for me. The weightless hydration claim isn't totally true in my opinion- it didn't weigh my hair down right away but on day two my hair felt leave it greasy, which is a big no no for my fine hair. And For a product that talks a lot about deep repair from the cortex to the cuticle and bond building technology, I didn't notice any long-term improvement in my hair's strength or texture after a few weeks of consistent use. My hair felt nice right after styling, but by the next day it felt like I hadn't used anything at all. I was hoping for more cumulative results over time, but it just felt like a temporary surface fix. Also, for something marketed as super hydrating and reparative, I expected more of a noticeable difference with my dry, color-treated hair. It was "good" for the first few hours, but not game-changing. Bottom line: It's an ok leave in treatment for people without fine or thin hair like mine. But could work for other hair types. And if you're looking for deep, long-term repair, this probably isn't the miracle worker it sounds like. Not bad for the right hair type, but not a repurchase for me.i was gifted this for my honest review.


Left my curls incredibly smooth and soft
Hair Type Very Curly Hair
I have mostly Type 4 hair. I've been using Olaplex products for the past 5 years and have found their products to be meh or fantastic. I recently tried No.10 and had major flaking, so I was looking forward to getting No. 5-Leave-In to see if that made a difference, which it did, but only slightly. If it weren't for the flaking and the fact that it could have a little bit more slip, this product would be 5 stars. This immediately smooths strands where you can tell the cuticle itself is smooth because the hairs are sliding against each other with no friction. And not much is needed, literally 2 pumps were enough for each quadrant of hair, and my hair is shoulder length. If you need more, try adding a little water first. I've used this for an Olaplex only twist-out, which I've done in the past, with the No. 5-Leave-In being the only new addition and my hair was noticeably softer, shinier, smoother, and stayed clumped and defined longer no matter how much I kept touching my hair. It was so smooth I couldn't stop literally sliding my fingers over my curls. My hair felt as smooth, if not smoother, than the hair dye swatches in stores. I can't wait to do a blowout with it because I can already tell it'll make a big difference. I'm not sure about the split end mending claims, nor have a tried it on dry hair. I did a wash-n-go this morning with it and can already tell there's flaking, but I'm wondering if I apply some on top of that'll help break the cast and eliminate it. This will mostly likely be a repurchase for me, especially if I have the expected results with a blowout. I did receive this product free in exchange for my honest review.



Definitely a new staple in my haircare routine!
Hair Type Straight Hair
I've been using OLAPLEX No.5 Leave-In — I received this product for free from OLAPLEX in exchange for my honest review, and I'm genuinely impressed! This is a leave-in product with a creamy texture and barely any scent. I prefer applying it to damp hair — it works best that way. The packaging is convenient, and the pump gives just the right amount. After using it, my hair feels thicker, softer, and smoother, without losing volume. The effect is salon-like: no dryness, no split ends, and damage from coloring or heat styling looks almost invisible. Even the color appears more vibrant. Definitely a new staple in my haircare routine!




Questions
Q&A
Showing 5 out of 13 Questions
- Q
How long will 3.3 oz last
- Asked by jo
- Official Answer By Olaplex - Brand EngageOur 3.3 oz No.5L Leave-In Conditioner is designed to be used sparingly, starting with 1 pump for fine hair or 2 pumps for medium to coarse hair. How long the bottle lasts will vary based on your hair length, thickness, and frequency of use.Was this answer helpful to you
- Q
Is is good for short dry gray hair
- Asked by Gmom
- Official Answer By Olaplex - Brand EngageYes! Nº.5L can be used on all hair types and is a great option for adding hydration, softness, and manageability to dry hair.Was this answer helpful to you
- Q
Is it safe for colored hair?
- Asked by Michelle
- Official Answer By Olaplex - Brand EngageYes! No.5L is safe for color-treated hair and is designed to help hydrate, soften, and protect damaged or dry strands without stripping color.Was this answer helpful to you
- Q
Do you apply this from the roots or mid-length to ends?
- Asked by Abby
- Official Answer By Olaplex - Brand EngageApply to clean, damp hair, focusing on mid-lengths to ends. If needed, you can lightly apply to roots, but use sparingly to avoid weighing hair down.Was this answer helpful to you
- Q
Can this be used on colored hair? I have s vivid color. Thanks in advance just want to be using the correct products
- Asked by SavyGillis
- Official Answer By Olaplex - Brand EngageYes, this is safe for color-treated and vivid hair. It helps maintain hydration and supports stronger-looking, healthier hair without affecting your color.Was this answer helpful to you