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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
Restore My Damaged, Split End
Hair Type Wavy Hair
I been using Olaplex No. 5 Leave-In for a few weeks now, and I can confidently say it's been a game changer for my damaged hair. My ends were dry, brittle, and split from heat styling and years of coloring, and this leave-in has helped me get back on track to healthy, softer hair. What I really love is that it's more than just a conditioner, its packed with Bond Building Technology, plus ingredients like jojoba seed oil, green tea extract, and niacinamide, which all work together to strengthen, hydrate, and protect. I apply it after I shower while my hair is still damp, focusing mostly on my mid-lengths and ends, and it instantly makes my hair feel smoother and easier to detangle. I've noticed my hair looks shinier, feels stronger, and my split ends are less noticeable.If I had one complaint, it's the scent. It's not a bad smell at all, it's fresh and salon-like but to me, it's just a bit too strong. I personally prefer fragrance-free products, so I wish they offered a lighter or unscented version.This product was provided for promotional purposes in exchange for my honest review.


Not for me
I have long straight hair. I was applying No 6 and my hair looked healthy and shiny but when I sow this new product, I decide to tru it, and this product made my hair look super dry and with a lot of freez. I had to return it and go back with No 6
Lucious, Lavish & Luminous!!
Hair Type Wavy Hair
Lucious, Lavish & Luminous. The best way to describe how my hair looks and feels after I started using OLAPLEX No.5L Moisture & Mend Leave-in Conditioner. I have a lot of thick hair. (So much, that if I want to keep it long. I have to have a 2 inch undercut) After my first use, I saw an immediate change. My hair felt silky and in better health/shape. Fast forward a week. My hair feels stronger. Any possibility of split ends, completely GONE! I love the light weight feel and texture of the product. Not to mention that OLAPLEX No.5L Moisture & Mend Leave-in Conditioner also is a Heat Protectant. On those days where it is extra dry and/or windy here in Wyoming. I take half a pump of the Leave-in Conditioner and on dry hair, smooth my ends. Soo fabulous!! Plus, I know come winter. My hair won't suffer from the wind & cold. I love the design of the bottle as well. Smart, innovative!!


Wow!
Hair Type Wavy Hair
This changed my hair! It took away all of the frizz.
Promising Start – Hair Feels Healthier Already!
Hair Type Wavy Hair
I've only been using the No.5 Leave-In™ Moisturize & Mend Leave-In Conditioner for a short time, but I'm already impressed with the early results. My hair tends to be dry, frizzy, and hard to manage—especially with heat styling and color treatments—but this product has made a noticeable difference. It goes on lightweight and doesn't leave any greasy or sticky residue, which I really appreciate. My hair feels softer, smoother, and looks more polished even on air-dry days. Detangling has also become so much easier. I can tell it's giving my hair the extra moisture it needs, and while it's early days, I'm optimistic this will become a staple in my routine. Excited to see the long-term benefits!

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