Professional Molecular Repair Mask

Professional Molecular Repair Mask is rated 4.7 out of 5 by 491.
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What It Is

Made to be used as part of the K18 PRO service (K18 PRO Mist + K18 PRO Mask)

 

This leave-in treatment mask does cleanup duty after damage caused during bleaching, chemical services, and heat. Powered by the K18PEPTIDE™ to reconnect broken polypeptide chains and disulfide bonds to renew strength and elasticity in just 4 minutes.

 

A retail-sized version of the K18 Mask helps to maintain your client's hair strength and elasticity in between salon appointments. This leave-in treatment mask for all hair types that reverses damage in 4 minutes. Patented peptide technology works to repair damage from bleach, color, chemical services & heat—restoring strength, softness, smoothness, and bounce to hair.

What It Does

• The K18PEPTIDE™ works at the innermost layer of hair, reconnecting polypeptide chains and disulfide bonds broken during bleaching, chemical services, and through heat damage. By addressing these damage sites at the innermost layer of hair, core strength and elasticity are renewed for strong, smooth, bouncy hair—even after the most extreme damage done in the salon.

• Damage is ongoing - Send the K18 retail sizes home with your client to keep hair health going, make services last longer, and maintain hair health in between appointments + the K18 PRO service.

What Else You Need to Know

• Powered by the patented K18PEPTIDE™, engineered over 10 years in a biotech lab to work on the molecular level to rebuild hair from the inside out in just 4 minutes.

• Because the K18PEPTIDE™ works at the molecular level, it works on every single hair type

• Clinically proven to reverse hair damage from: Bleach + Color, Chemical Services, Heat

• Restores strength, softness, smoothness, and bounce

• Immediate + progressive results

• Vegan, color-safe, cruelty-free

 

With just one salon treatment using the K18 PRO Service (PRO mist + PRO mask), hair is restored up to:

• 91% original strength*

• 94% original elasticity*

 

*Results observed in a clinical study while using mist and mask as part of a bleaching treatment. Results may vary depending on hair type, quality, and history.

For at home use / or salon use without a chemical service:

1 - Shampoo, do not condition.

2 - Towel-dry thoroughly.

• 15ml size mask = Begin with 3 pumps of K18 leave-in molecular repair hair mask, only add more as needed depending on length, thickness, and condition. Apply all over, one pump at a time, maximum dosage is 9 pumps.

• 50 + 150ml size mask = Begin with 1 pump of K18 leave-in molecular repair hair mask, only add more as needed depending on length, thickness, and condition. Apply all over, one pump at a time, maximum dosage is 3 pumps.

3 - Let sit for 4 minutes. Do not rinse out.

4 - Then comb, add product + style as usual.

5 - Use for the first 4-6 washes, then as needed.

 

How to use with a chemical service:

1 - Prior to your service, mist hair with water (do not saturate).

2 - Section dry hair into 4 quadrants

3 - Apply K18 PRO mist per quadrant based on length and density

4 - Let sit for 4 minutes. Do not rinse out.

5 - Dry hair if needed, then perform desired chemical service.

6 - Shampoo, do not condition.

7 - Towel-dry thoroughly.

8 - Apply K18 PRO mask and add more as needed depending on length, thickness, and condition. Work evenly into hair from ends to roots, one pump at a time.

9 - Let sit for 4 minutes to activate. Do not rinse out.

10 - Then comb, add product + style as usual.

 

*Refer to the K18 service guide pdf for specific usage and dosage instructions by chemical service.

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.

Purchases made in SalonCentric stores may be returned to any SalonCentric store. Purchases made through SalonCentric Customer Service, SalonCentric Business Partners, and SalonCentric.com orders Sold and Shipped by SalonCentric may be returned to a SalonCentric store; however, the return must not exceed $450 and must include the original receipt, packing slip, or invoice. For returns in-store of online orders, the refund will be credited back to the original payment method once the return has been processed. For SalonCentric.com Online Exclusive orders sold and shipped by third-party sellers, please see more details linked below for return steps.

The SalonCentric return policy does not currently apply to Kérastase & Shu Uemura purchases. Kérastase & Shu Uemura do not accept returns.

Click to see more details.

Rated 5 out of 5 by from Magic!!! Works like magic. All my blonding clients get this in their hair
Date published: 2025-03-29
Rated 5 out of 5 by from Repair mask Works great makes the hair feel so good and looks shiny
Date published: 2025-03-18
Rated 5 out of 5 by from Can’t live without. I have had clients use this product to maintain healthy hair and to completely repair over processed strands. Each time it blows me away. 10/10
Date published: 2025-02-24
Rated 5 out of 5 by from The BEST!! I have never used anything that works as well as this for repair! Completely transformed my hair! Thank you K18!
Date published: 2025-02-17
Rated 5 out of 5 by from Damage curls I didn't have color damage but has helped me revive my curl pattern after heat damage and continued Flat Ironing. Leaves the hair incredibly soft.
Date published: 2025-02-17
Rated 5 out of 5 by from Wowza. Are you kidding me.. This is product is a must, for everyone. Alittle goes a long way. My hair has come a long way. After using k18 for a month now, my hair is so much softer, less damage and so much healthier overall. Im addicted.
Date published: 2025-02-17
Rated 5 out of 5 by from K18 mask This mask is amazing. I had heard a lot of good reviews, so I decided to try. In 4 treatments it has transformed my hair. It is so much healthier and shinier.
Date published: 2025-02-13
Rated 5 out of 5 by from love obvi honestly i think everyone has heard it before but this brand and product spacifcly are both absolutely incredible. i love that they explain the science behind the peptide in great detail it is amazing to see the results and understand what is happening.
Date published: 2025-02-03
Rated 5 out of 5 by from saved my hair i lighten my hair A LOT and this has saved me from damage
Date published: 2025-02-02
Rated 4 out of 5 by from Package sucks Awesome except for packaging sucked You have to cut it open there is so much product left in the bottle when it’s gone
Date published: 2025-01-21
Rated 5 out of 5 by from Love!! My favorite!! Love the way it makes the hair feel thicker and healthier. I love this much more than Olaplex no. 3 hands down!
Date published: 2025-01-20
Rated 1 out of 5 by from Don’t skip your regular conditioner Don’t skip your regular conditioner like the instructions suggest
Date published: 2025-01-19
Rated 1 out of 5 by from shockingly disappointed I’m a bleach girlie and I got the shampoo, conditioner and mask because of all the hype on the internet but it literally did nothing for my hair, I was shocked:(
Date published: 2025-01-15
Rated 5 out of 5 by from K18 Mask I’ve been using the mask for 6 months. Both on my hair and clients hair. It really works. I just wish it wasn’t so expensive
Date published: 2025-01-13
Rated 5 out of 5 by from Love!! K18 is a game changer!! So glad they came out with this stuff.
Date published: 2025-01-12
Rated 5 out of 5 by from Obsessed The best product out there right now to correct existing damage as well as prevent. I love the smaller sizes for clients to take home and add to their haircare routine to ensure their hair is healthy. The no processing time of using this product is great. No wait time! Couldnt ask for more!
Date published: 2025-01-02
Rated 4 out of 5 by from good got this for my friend to try because she changes her hair color SO often, she hasn’t seen results after the first use but after using it a few times her hair looks healthier
Date published: 2024-12-27
Rated 5 out of 5 by from Amazing! Not only is the price amazing, this lasts me a whole year and is an absolute game changer!
Date published: 2024-12-21
Rated 5 out of 5 by from Wonderful This stuff is amazing at transforming damaged hair into a smooth, filled canvas! It really works from the inside out to heal your strands.
Date published: 2024-12-19
Rated 5 out of 5 by from worth the hype noticeable difference after consistence use on damaged coarse hair.
Date published: 2024-12-17
Rated 5 out of 5 by from I can’t live without it! This leave in has helped revive my hair from lightener damage. My hair feels strong and I have less breakage when brushing.
Date published: 2024-12-11
Rated 5 out of 5 by from Fantastic mask [Employee of saloncentric] This is a fantastic product for hair repair. It makes my hair feel smoother and hydrated. Hair looks healthier in just one use!
Date published: 2024-12-03
Rated 5 out of 5 by from Staple in all my lightening services Been using this after all my highlighting services and will never go back! Makes the hair feel soo strong and evens out the porosity to make my glosses go on like butter
Date published: 2024-11-30
Rated 5 out of 5 by from Absolutely blown away. I was skeptical. This stuff is insane. My very highlighted hair is shiny and strong. I can’t believe it.
Date published: 2024-11-29
Rated 5 out of 5 by from Instant difference Totally was able to transform my clients hair in just one application.
Date published: 2024-11-23
Rated 5 out of 5 by from Best hair mask Is the best hair mask your hair will shine and feel sooo soft and will also repair the damage
Date published: 2024-11-20
Rated 5 out of 5 by from magic! I use k18 on all of my blonde clients and they love how their hair feels after their service
Date published: 2024-11-16
Rated 5 out of 5 by from amazing product Really works as it says. Helps with frizz and damage and worth every penny. 10/10 recommend to use this on yourself and clients! They will love and appreciate the results.
Date published: 2024-11-10
Rated 5 out of 5 by from Must buy It makes my naturally dry coarse curly hair soft and healthy
Date published: 2024-11-06
Rated 5 out of 5 by from Best of the BEST! Has helped repaired and kept my hair healthy from chemical services I’ve being getting done. Not only use on my hair but my clients hair as well
Date published: 2024-11-04
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