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Leave-In Molecular Repair Hair Mask

5.3K |
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Out of Stock
$60.00 $75.00
What it is: A leave-in treatment mask for all hair types that clinically reverses damage in four minutes. The patented peptide technology works to rep
Scent
1.7 oz/50 mL
1.7 oz/50 mL
0.5 oz/ 15 mL
0.5 oz/ 15 mL
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Estimated delivery Oct 18–Oct 23
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K18 Biomimetic Hairscience

What it is: A leave-in treatment mask for all hair types that clinically reverses damage in four minutes. The patented peptide technology works to repair damage from bleach, color, chemical services, and heat, restoring strength, softness, smoothness, and bounce to hair.

 

Hair Type: Fine, Medium, and Thick

 

Hair Texture: Straight, Wavy, Curly, and Coily

 

Hair Concerns:
- Damage/Split Ends/Breakage

- Color Safe

- Straightening/Smoothing

 

Key Benefits: 
- Restores strength, softness, smoothness, and bounce

- Repairs damaged hair

- Easy leave-in formula delivers lasting results

 

Highlighted Ingredients:
- K18Peptide™: Repairs damage from bleach, color, chemical services, and heat.

 

Ingredient Callouts: This product is vegan, cruelty-free, and comes in recyclable packaging.

 

What Else You Need to Know: This mask is powered by the patented K18Peptide, which is just the right size and molecular structure to reach the innermost layers of hair and re-connect broken keratin chains responsible for hair's strength and elasticity.

 

Fragrance Description: 

K18's Signature Scent: The light floral scent features notes of jasmine and peony.

 

K18 x Future Society Scent: Floating Forest fragrance has cool, aquatic, floral notes—rooted in an extinct rainforest tree once found only in Borneo.

 

Top notes: Cooling Bergamot + Black Pepper

Mid notes: Dewy Freesia, Water Lily + Rose Absolute

Base notes: Salted Musk, Wet Stones + Papyrus

 

Clinical Results: In a clinical study on hair that was bleached 8 times, after 2 uses:

- Biotech-powered K18Peptide restored damaged hair by up to 82%

 

This product is an Allure Best of Beauty award winner.

 

Clean at Sephora is our commitment to offering effective products without certain ingredients, such as parabens, sulfates, phthalates, and mineral oils. Learn more here.

Verified Purchase
4d ago
Saved my damaged bleached hair!!
I swear by this product. My hair was over processed after going blonde and this product helped to repair the damage. I noticed less breakage and my hair looks shinier. It’s pricey but it’s so worth it. I’ve tried so many different products and this is the only product I will continue to repurchase.
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ISR2500
Verified Purchase
4d ago
Magic in a bottle!
Amazing product! It is like magic in a bottle. My hair were fairly damaged from heat tools but just the first application gave results I found hard to believe. Hair felt super soft, hydrated and friss free although it was just this product after shampooing (I used a clarifying shampoo and no conditioner afterwards so was expecting the hair to go wild with frizz). Please do not use conditioner and use the product as advised in the product instructions for best results!
Read more
Lovelll
Verified Purchase
6d ago
Did Nothing!
I want to love this, I have purchased this product 3 or 4 times HOPING for some magic, but it literally does nothing for my fine, highlighted hair- no difference. Even after a healthy trim I had, my hair looks and feels the same. Dull. I don’t think I will try it again as there are much better products out there and the price of this is not worth it for me!
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bamaral
6d ago
Hairloss
It ruined my hair! They're falling so bad. Scam product!
Read more
lainazl
1w ago
Yass
I really like this leave in mask. Leaves my hair feeling soft and tames the frizz
Read more
seriuouslyguys
1w ago
I’ve been using this for over two years and I’m on my third bottle. My brother who is a hairstylist recommended it to me. It has made a huge difference in my hair. My hair looks much more healthier and I’m barely losing hair in the shower. I used to lose a lot of hair in the shower.
Read more
Xoxoroya
1w ago
Useless
Doesn’t work used it in Europe & Toronto didn’t see change in my hair or improvement whatsoever
Read more
sarahsteed
Verified Purchase
2w ago
Not satisfied with this product at all…loosing too much hair when I’m using
Read more
Leilajoon
Verified Purchase
2w ago
Absolutely love it!! After use this product I can brush my hair easy-peasy
Read more
Odinnadtsataya
Verified Purchase
2w ago
Don’t use if you bleach your hair
I a big K18 fan. I use the oil, airwash, and heat protectant. Got a sample size of this as one of my rewards and I really liked it. Was having some issues with my ends and the little bit I used seemed to help. Purchased the mini size to have access to more product and it destroyed my hair. Made my ends drier and crispier and caused so much breakage. Thank god I have short hair and will hopefully cycle through the damage quickly.
Read more
stephaniem5

What it is: A leave-in treatment mask for all hair types that clinically reverses damage in four minutes. The patented peptide technology works to repair damage from bleach, color, chemical services, and heat, restoring strength, softness, smoothness, and bounce to hair.

 

Hair Type: Fine, Medium, and Thick

 

Hair Texture: Straight, Wavy, Curly, and Coily

 

Hair Concerns:
- Damage/Split Ends/Breakage

- Color Safe

- Straightening/Smoothing

 

Key Benefits: 
- Restores strength, softness, smoothness, and bounce

- Repairs damaged hair

- Easy leave-in formula delivers lasting results

 

Highlighted Ingredients:
- K18Peptide™: Repairs damage from bleach, color, chemical services, and heat.

 

Ingredient Callouts: This product is vegan, cruelty-free, and comes in recyclable packaging.

 

What Else You Need to Know: This mask is powered by the patented K18Peptide, which is just the right size and molecular structure to reach the innermost layers of hair and re-connect broken keratin chains responsible for hair's strength and elasticity.

 

Fragrance Description: 

K18's Signature Scent: The light floral scent features notes of jasmine and peony.

 

K18 x Future Society Scent: Floating Forest fragrance has cool, aquatic, floral notes—rooted in an extinct rainforest tree once found only in Borneo.

 

Top notes: Cooling Bergamot + Black Pepper

Mid notes: Dewy Freesia, Water Lily + Rose Absolute

Base notes: Salted Musk, Wet Stones + Papyrus

 

Clinical Results: In a clinical study on hair that was bleached 8 times, after 2 uses:

- Biotech-powered K18Peptide restored damaged hair by up to 82%

 

This product is an Allure Best of Beauty award winner.

 

Clean at Sephora is our commitment to offering effective products without certain ingredients, such as parabens, sulfates, phthalates, and mineral oils. Learn more here.

-K18Peptide™: Repairs damage from bleach, color, chemical services, and heat.

Water (Aqua) (Eau), Alcohol Denat., Propylene Glycol, Cetearyl Alcohol, Dicaprylyl Ether, Cetyl Esters, Behentrimonium Chloride, Polysorbate 20, sh-Oligopeptide-78 (K18Peptide), Hydrolyzed Wheat Protein, Hydrolyzed Wheat Starch, Isopropyl Alcohol, Tocopherol, Phenoxyethanol, Potassium Sorbate, Citric Acid, Fragrance (Parfum), Geraniol, Linalool, Hexyl Cinnamal, Benzyl Alcohol.

The list of ingredients is subject to change, please consult the packaging of the product purchased.
Suggested Usage:
In the shower:
-Shampoo, don‘t condition.

Once out of the shower:
-Using a towel gently dry hair until damp.
-Begin with one mL/one dime-size amount of K18 Mask.
-Only add more as needed. Average use is two mL/two dime-size amounts (this is a highly concentrated formula, so you‘ll need much less than traditional masks).
-Work evenly into hair from ends to roots.
-Let sit for four minutes to activate.
-Don‘t rinse out.
-Style as usual after the four minutes is up (fine to add heat protectant or styling product now).
-Use for the first four to six washes, then swap to maintenance mode and use as needed.
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