Olaplex Nº. 9 Bond Protector: Nourishing Hair Serum & Heat Protectant | Softens, Nourishes & Reduces Tangle & Static | For Coily, Curly, Straight, and Wavy, 90 mL / 3.0 Fl Oz
Condition: New
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FREE 30-day refund/replacement
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Availability:
In Stock.
Arrives
Wednesday, Feb 25
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Is Discontinued By Manufacturer : No
Product Dimensions : 1.38 x 1.38 x 6.63 inches; 3.2 ounces
Item model number : 20142284
UPC :
Manufacturer : Olaplex
Best Sellers Rank: #3,566 in Beauty & Personal Care (See Top 100 in Beauty & Personal Care) #7 in Hair Styling Serums
#7 in Hair Styling Serums:
Customer Reviews: 4.6 4.6 out of 5 stars (6,615)
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Wednesday, Feb 25
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
I use this product almost every time after I towel dry my hair. It has become an essential part of my hair care routine, providing me with the perfect balance of moisture and hold. If I’m planning on wearing my curls, which are of the 2C-3A hair type, I’ll pair this product with the ouai curl cream. Together, they leave my hair so smooth and frizz-free, enhancing the natural beauty of my curls. The combination is incredibly effective, and I often receive compliments on how defined and healthy my curls look. Sometimes, I’ll just use this product without the curl cream, and it works really well if I’m just straightening my hair as well. The product has a unique ability to smooth out my hair, reducing the need for excessive heat styling. It provides a sleek finish that lasts throughout the day, keeping my hair looking fresh and polished. Overall, it’s a very versatile product, and it’s a must-have in all of my hair routines. Whether I’m curling or straightening, it consistently delivers great results. I highly recommend this product to anyone looking to improve the quality and manageability of their hair. It’s a game-changer and has definitely earned its place in my beauty arsenal.
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Reviewed in the United States on January 7, 2025 by joseph
If your hair is feeling dull, frizzy, or vulnerable to heat and pollution, Olaplex No. 9 might be the rescue remedy you’ve been waiting for. This leave-in serum is designed to protect, smooth, and revive your strands — and it’s earned rave reviews across the board. 🌟 What Makes It Special: • Triple-Action Formula: Combines Olaplex’s patented bond-building technology with red algae extract to strengthen hair, shield it from environmental damage, and boost shine. • Heat & Pollution Protection: Guards against heat styling up to 450°F and defends hair from pollutants and UV rays for up to 48 hours. • Lightweight & Non-Greasy: Unlike many serums, it doesn’t weigh hair down or leave it oily — even on fine strands. • Versatile Use: Works beautifully whether you air dry, blow dry, or style with hot tools. Some users even apply it to dry hair between washes for added smoothness.
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Reviewed in the United States on September 18, 2025 by Greidy Rojas Greidy Rojas
“I’ve been using this Olaplex nourishing serum for a few weeks now, and I’m really impressed. My hair feels softer, smoother and much more manageable. It reduced frizz and added natural shine without weighing my hair down or making it greasy. The scent is pleasant and subtle, and a little amount goes a long way. Overall excellent product. I’ll definitely keep using it
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Reviewed in the United States on December 6, 2025 by Fatima Rivera
This is the holy grail of hair products. I am in my late 40s and have thin, dry, color damaged hair. My hair has been frizzy and I could only wear a ponytail and even in that it would become a tangled rat mess. I have tried 100s of dollars in products from Keratin hair treatments, Aveda products, Nexus, Pantene, Its a 10, blowouts EVERYTHING under the sun and nothing was working. I was ready to shave my head and start over. Then I found this and read soooo many reviews and said shoot all I have to lose is more money. So for my fine, thin, color/highlighted damaged hair I got the 4/5 shampoo and conditioner, weightless nourishing mask,#3 Bond building hair and the #9 Bond Protector. My hair is now SOOOFFFTTT, not frizzy even when it is humid out (I live in the desert) so not many humid days until recently. This is all in just 3 days!!! Day one I used the Shampoo and Hair mask with already noticeable difference, Day 2 and 3 I used only the shampoo and conditioner. I started with the small bottles at $30 each and I am so far very pleased and plan on once I run out getting the larger bottles. I will tell you that you need a very very small amount of shampoo, it goes a LONG ways. The conditioner maybe a nickel size amount as it also goes a long ways. When I first used this and was done rinsing my hair, it did not feel soft and I was thinking okay I am going to not have fun brushing my wet hair and it was going to be a waste of money. Boy I was fooled. even though my hair did not feel soft and slick after conditioning, the wet brush I use as always just glided thru my hair with such ease. I was like oh okay and then once I dried it I was completely shocked at the difference the first wash alone had made. There were no tangles and the entire day my hair has been smooth, soft and manageable! I say take your chance and get this product, I hope you are as happy as I am with this. I plan on tossing every other hair product away now that this is the only thing that genuinely works for my hair in a way that I have never experienced with a hair product before.
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Reviewed in the United States on January 8, 2026 by Flippo Flippo
I use heat tools often , and this serum has been a game- changer. It protects, tames frizz, and adds shine without making my hair greasy . The scent is nice too. Only reason i give 4 stars is the price - but the quality justifies it!
Reviewed in the United States on June 6, 2025 by Yuly García Yuly García
It was great defrizzes hair
Reviewed in the United States on February 17, 2026 by Bookish Girl
This stuff works surprisingly well! I tested it out by putting some on my dry hair on my ends and up toward my crown, focusing on areas with fly-aways. Then I followed it with straightening my hair with a flat iron. It made my hair significantly less frizzy and sleek looking. Once straightened the product seems to hold my hair in place—like giving it a new set-point. Instead of looking like wavy hair that’s been straightened my hair just looked like it’s naturally straight. I really love that. It took little effort with my straightener and less passes to straighten it. It’s now part of my regular routine and will likely stay that way unless they stop making it. My hair is down to my waist, thick but fine, and naturally wavy. My scalp can get oily easily with products, but I didn’t notice any difference in oiliness while using this. The smell is not very noticeable. It’s like a non-offensive, clean smell. It doesn’t compete with my perfume. The consistency is like a watery gel. It almost feels like hair gel when you put it on because you can feel it dry to the hair quickly. But it doesn’t make it feel stif, crunchy, sticky, oily or anything. It feels kinda perfect, like magic. It’s a cool product, I love it and recommend it!
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Reviewed in the United States on May 12, 2024 by Natalie