K18REPAIR™ Service Kit

K18REPAIR™ Service Kit is rated 4.9 out of 5 by 46.
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What It Is

Powerful professional duo fortifies, strengthens + repairs hair in 2 easy steps.

What It Does

K18REPAIR™ is a 2-step salon-exclusive damage repair service powered by K18PEPTIDE™ to protect, strengthen + preserve all hair types through lightener, color, chemical services, and heat. Feel confident in every service + deliver hair like new*—no matter what you put it through. 

What Else You Need to Know

K18REPAIR™ is powered by the reparative K18PEPTIDE™ to reconnect broken disulfide bonds + polypeptide chains for immediate + lasting repair at the deepest, molecular level of hair. It’s more than a bond builder—K18PEPTIDE™ is biomimetic to hair and works past the outer cortex (where bond builders work)—so water can't wash away your results.

2 steps, 4 minutes each. No extra rinse required.

step 1 repair hair to the core pre-service PRO mist:

• Fortify hair to restore up to 99% elasticity*

• Improve hair’s resilience to prevent damage during + after services*

• Deliver stronger hair over time*

• Make color last longer + fade slower* when paired with K18 mask usage at home

• pH 7.5-8.0 swells the hair cuticle open for effective repair pre-service

 

Professional molecular repair hair mist:

• Fortifies hair pre-service to restore up to 99% elasticity*

• Improves post-service resilience for stronger hair over time*

• Color lasts longer + fades slower when paired with mask usage at home*

 

Professional molecular repair hair mask:

• Reverses hair damage caused by bleach* + color*, chemical services*, and heat*.

• Immediate + progressive results* Vegan, color-safe, cruelty-free 

 

step 2: reverse damage post-service PRO mask:

• Reverse damage from lightener + color, chemical services, and heat* 

• pH 5.0-6.0 helps close the cuticle + seal K18PEPTIDE™ into the hair for lasting results 

• Soften + detangle all hair types with lightweight emollients

For stylist use with a color or chemical service

Apply the PRO molecular repair hair mist:

• Section dry hair into 4 quadrants.

• Lightly dampen hair with water (do not saturate).

• Apply a minimum of 10 full sprays of K18 professional molecular repair hair mist to each quadrant, increasing up to 20 sprays per quadrant as needed, depending on client’s length, density, and level of damage.

• Wait 4 minutes (do not rinse out).

• If needed, dry the hair prior to applying lightener or color. Then perform your desired technique.

• Process your lightener or color as usual, then rinse and shampoo with K18 PEPTIDE PREP™ detox shampoo. Do not condition.

 

Apply the PRO molecular repair hair mask:

• Apply 1-3 pumps of K18 professional molecular repair hair mask based on your client’s length and density, starting at the ends and working up towards the roots.

• Wait 4 minutes (do not rinse), then proceed with cut or style as usual.

"Professional Molecular Repair Mist Ingredients: Water (Aqua) (Eau), Alcohol Denat., Propylene Glycol, Polysorbate 20, sh-Oligopeptide-78 (K18PEPTIDE™), Hydrolyzed Wheat Protein, Hydrolyzed Wheat Starch, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Phenoxyethanol, Potassium Sorbate, Potassium Hydroxide, Fragrance (Parfum), Geraniol, Linalool, Hexyl Cinnamal, Benzyl Alcohol. Professional Molecular Repair Hair Mask Ingredients: 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 Great product! Wonderful product for taking care of your blonde clients hair!
Date published: 2026-01-24
Rated 5 out of 5 by from Winner Amazing Stuff, a staple in my salon. I use with every client that has any chemical service.
Date published: 2026-01-05
Rated 5 out of 5 by from Recommended Great product! I’m trying is out for the first time and it help's with my overly dry hair. Definitely feels stronger after one use. The product does smell amazing.
Date published: 2025-12-23
Rated 5 out of 5 by from WOW amazing product, works every time
Date published: 2025-12-10
Rated 5 out of 5 by from the best product!! As a Blonding Specialist I wouldn’t do a service without k18!!
Date published: 2025-11-16
Rated 5 out of 5 by from Would buy again The duo is brilliant . Buying it together makes it simple . K18 works incredible for compromised hair and to keep hair from being compromised.
Date published: 2025-10-21
Rated 5 out of 5 by from Easy smart worth the money Love the simplicity of this product line, have not been disappointed
Date published: 2025-09-04
Rated 5 out of 5 by from dry frizzy to sleek and smooth dry overly processed hair, 1 treatment, followed steps to a T, added little blowdry spray and dried using paddle brush. NO HOT TOOLS. A-MA-ZING!!!
Date published: 2025-08-24
Rated 5 out of 5 by from Love it Works amazing! I’ve noticed a big difference with results🩵
Date published: 2025-07-23
Rated 5 out of 5 by from I love k18 Great product, sad they’re no longer including the chelator
Date published: 2025-06-10
Rated 5 out of 5 by from Best treatment Amazing Helpful keeps the hair strong and soft
Date published: 2025-06-08
Rated 5 out of 5 by from Love it! This has single handedly transformed my hair from tangled mess to curl clumps!
Date published: 2025-05-03
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