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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
A leave-in conditioner that leaves my hair soft and manageab
I'm really enjoying this OLAPLEX leave-in conditioner. I use it after washing my hair and I love how it leaves it: soft, hydrated, and so much easier to style. It's easy to apply and doesn't need rinsing. Plus, my hair feels light and beautiful, without feeling weighed down. It's definitely become a step I enjoy adding to my routine!

No-Fuss & Frizz-Free
I've been keeping this leave-in conditioner in my bag, and it's honestly so convenient. The size is perfect for tossing in my carry-on or gym bag without taking up space, and I love that it's fragrance-free, no clashing with my perfume or other products throughout the day. A little goes a long way, so this small size actually lasts. My biggest struggle living in Florida is frizz from the humidity, and this one genuinely keeps it under control. What I love most is how easy it makes detangling and smoothing without any extra steps. I just spray it on damp or dry hair, run my fingers through, and my hair instantly feels softer and more manageable. No greasy feel, no weighing my hair down, just soft, healthy-looking strands whether I'm touching up mid-flight or refreshing my hair after the gym. My routine now: spray a light mist through mid-lengths and ends, work it in, and go. Hair stays smooth and frizz-free all day, no matter where I am.

Perfect for Heat Styling
This leave-in conditioner is rich and moisture-heavy. Since it is so rich and heavy, I actually would not use this for day-to-day styling. Instead, it has become my go-to specifically for blowout and straightening days! It provides 450°F heat protection, which is always what I aim for whenever I am using heat tools on my hair. It leaves my hair feeling so soft, smooth, and fully protected. This is amazing for those heavy heat-styling days when you need serious protection and moisture. I received this product as a part of an educational promotion.
Good conditioner.
I have been testing this Olaplex leave-in conditioner on my hair and it is excellent. It leaves it very soft and clean, not greasy or heavy at all. It also helps with the frizz. A small amount is enough for the whole hair. I think it works very well.

Amazing Multi-tasking Product
I received this product as part of an educational promotion and tested it for 7 days. As someone with fine, thin hair, I have to be very careful about layering too many products. Finding products that do more than one task are a game changer. I love that this gets so many things done all in one product.Not only does it mend split ends and moisturize, it includes a heat protectant as well. I apply to damp hair, focusing more on the ends, and only use 3-4 pumps since I have such fine and short hair. It feels very lightweight upon application. After my normal blow drying routine, I notice my hair appears more smooth than usual. To my surprise, this does not cause increased greasiness on my day-two hair. I am a big fan and am so excited to have this added to my 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