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OLAPLEX No. 9 Bond Protector Nourishing Hair Serum

3.0 fl oz
$30.00
Highlights
  • Repairs and strengthens damaged hair
  • Provides heat protection up to 450 degrees
  • Provides environmental protection
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Product Overview

OLAPLEX No. 9 Bond Protector Nourishing Hair Serum protects hair from pollution and styling heat while repairing existing damage.

This leave-in, silicone-free hair serum shields hair from pollution and heat that contribute to tangles, breakage and static. Formulated with OLAPLEX bond building technology, this serum repairs existing damage for stronger, more resilient hair.

Key Features:

  • OLAPLEX's patented ingredient, Bis-Aminopropyl Diglycol Dimaleate, repairs damaged hair's disulfide bonds transforming brittle, dry hair into soft, manageable, shiny hair
  • Antioxidant-rich red algae extract nourishes hair, blocks pollutants, and neutralizes free radicals for up to 48 hours
  • Provides heat protection up to 450°F

Note: At LovelySkin, we take your health and the health of your hair seriously. We have contacted OLAPLEX and spoken with their scientists about the recently announced issues. From statements by their scientists and CEO, it appears that there is no reason to believe that OLAPLEX products cause hair loss or hair breakage. Every OLAPLEX product is thoroughly tested by both their in-house formulators, as well as independent third-party laboratories. They use industry-standard Human Repeat Insult Patch Tests, also known as HRIPT, in which every OLAPLEX product is tested on humans to ensure it doesn’t cause skin irritation, inflammation or sensitivity. When hair products pass these industry-standard tests, it also means there is no caused inflammation to the hair follicle, which is a known cause of hair loss. If you are interested, you can read these findings on the OLAPLEX website.

Please note: This product may ship in temporary packaging. The size, fill and formula have not been changed.

Highlights

  • Repairs and strengthens damaged hair
  • Provides heat protection up to 450 degrees
  • Provides environmental protection

Ingredients

Directions

Shipping & Returns

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Return Policy: This product is non-returnable

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Special Shipping Requirements: ORM-D Class
ORM-D classified products such as aerosol sprays, nail polish, perfume and products with high alcohol content may only be shipped using a ground method within the Continental US.

Availability: In stock & ready to ship! . Ships within the U.S. only.

Questions & Answers (3)

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Product Specifications

Customer Reviews (53)

Overall Rating

4.8
Based on 53 reviews

Review Summary

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53 Reviews

Profile picture of ChristyCat.

ChristyCat

from California

Age Group: 50-59

Curly, Color treated hair

Combination Skin

Verified Purchase

November 05, 2025

Nice product...

This is my second favorite leave in/styling product only second to no. 10. It is a decent curl gel and nice when I straighten. It leaves my hair shine and cuts the frizz. Sometimes I combine it with no. 6 or 5L if I need more moisure.

0 people found this helpful

Profile picture of EPyer.

EPyer

from Tennessee

Age Group: 70-79

Straight, Color treated hair

Normal Skin

Verified Purchase

August 30, 2025

olaplex 9

This hair serum works well in taming my thin fly-away hair and makes styling very easy

0 people found this helpful

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LovelySkin Customer

Verified Purchase

July 26, 2025

Great improvement

I have long straight fine hair and this helps with the frizz and has definitely helped protect my hair and making it feel stronger.

0 people found this helpful

Profile picture of Rae.

Rae

Verified Purchase

July 03, 2025

Heat protection

I am very happy with the results of this hair serum. It’s a great heat protectant and also really softens my hair when air drying. Great product.

0 people found this helpful

Profile picture of AWL.

AWL

Verified Purchase

June 08, 2025

This is the first in the Dream Team applications

This serum has replaced the serum (also amazing) that I was using. This serum helps remove tangles before I brush my hair, and smoothes my wet curls before I use my Olaplex Leave-in Conditioner (with a drop of Olaplex Oil). What a hair regimen!

1 person found this helpful

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LovelySkin Customer

Verified Purchase

April 12, 2025

A daily go-to

Previous to discovering Olaplex #9, I used #6. I like #9 even more! It's not heavy; a little goes a long way - and it protects against the heat.

0 people found this helpful

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LovelySkin Customer

Verified Purchase

January 04, 2025

love!

I use this with the Olaplex Bond smoother and really like the results!

0 people found this helpful

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LovelySkin Customer

Verified Purchase

December 31, 2024

Pleasure to use

I have curly hair that can get frizzy. Just a small amount on damp hair keeps my hair in check. You don’t need much and it feels great!

1 person found this helpful

Profile picture of Marisabel.

Marisabel

Verified Purchase

November 25, 2024

Excellent product!

Love this product!

0 people found this helpful

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LDF

Verified Purchase

September 07, 2024

Light serum

I like using this serum, and would repurchase. I like all the Olaplex products I have tried, but this is the easiest to use. Just put onto hair and it absorbs nicely, and does not leave my very dry hair oily or sticky or crunchy. It is a nice scent like all the olaplex. It is not like a hair oil, and not like a thick conditioning balm type product. It is light and slightly nourishing.

2 people found this helpful

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LovelySkin Customer

Verified Purchase

June 20, 2024

Best hair serum

I use this hair serum after shampoo/ conditioner. This makes hair smooth. free from tangles. Also nice to apply on dry hair to give an extra moisture look.It doesn’t weigh down the hair and makes it manageable. As part of hair treatment regimen makes hair healthier and fuller.

0 people found this helpful

Profile picture of Meilee.

Meilee

Verified Purchase

May 25, 2024

Great product

The No 9 leaves my hair shiny and soft.

1 person found this helpful

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LovelySkin Customer

Verified Purchase

May 17, 2024

Must have for my dry thin hair

it really helps give me added strength for my hair.

2 people found this helpful

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LovelySkin Customer

Verified Purchase

May 02, 2024

Love it

This Olaplex is my new go-to styling product. It makes my hair smooth but not limp, and it doesn't have an oppressive scent.

0 people found this helpful

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LovelySkin Customer

Verified Purchase

April 27, 2024

Great Hair Serum!

I originally received this as a free gift with purchase. I have fine, thin hair and once I tried this I knew I would be purchasing it again. I use it after I towel dry my hair and it makes my hair feel stronger and more resilient to heat from the hair dryer and curling iron, which I only use occasionally.. This serum seems to strengthen my hair as well. I am very happy with this product and will continue to buy.

1 person found this helpful

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LovelySkin Customer

Verified Purchase

April 12, 2024

Love

This product protects my hair from heat & keeps frizz down & adds texture

1 person found this helpful

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Zumba78

Verified Purchase

April 02, 2024

My favorite hair product

I love this product. Makes my hair silky smooth even when humid outside. Definitely my go to

0 people found this helpful

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LovelySkin Customer

Verified Purchase

February 29, 2024

Definitely helps!

My shoulder length hair is baby-fine but a bit thin and tends to be fly-away in the winter. Working No. 9 into the ends, or mixing it with No. 6 and massaging it from root to ends, after washing helps smooth it out :-) It won't make your hair greasy unless you get heavy-handed. I'll definitely be keeping this in stock!

1 person found this helpful

Profile picture of MarielaP.

MarielaP

Verified Purchase

January 06, 2024

Heat protectant

Olaplex #9 says its a nourishing hair serum and heat protectant. It leaves hair smooth when applied to damp hair and let air dry. I add 2 drops of the bonding oil to #9 and apply.

0 people found this helpful

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LovelySkin Customer

Verified Purchase

January 02, 2024

Good

Hair feels light and hydrated after each apply. Not greasy feel. Will buy again.

0 people found this helpful

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