• INFO


Spray Pro Serum onto hair before bleaching or coloring to strengthen hair and mitigate damage before the bleaching and coloring service.


Apply Pro Masque as a leave-in treatment after processing to strengthen hair and mitigate damage caused during the bleaching and coloring service. Hair is restored to 82% virgin strength and elasticity in a single application.

Apply before bleaching & coloring mitigates damage caused during processing.

  1. To prep the hair, lightly mist with water, and apply serum section by section.
  2. Wait 4 minutes. Do not rinse.
  3. Apply color/bleach directly on top of serum.
  4. Shampoo hair. Skip the conditioner, and towel-dry thoroughly.  
  5. Apply Masque.
  6. Wait 4 minutes. Do not rinse out (even if toning).  

If styling: after 4 minutes, apply styling products if desired and dry/style.
If cutting: begin right away
If toning: apply toner on top of the Masque after step 3 & repeat steps 1, 2 & 3 after toning has completed.


Masque: Water (Aqua) (Eau), Alcohol Denat., Propylene Glycol, Dicaprylyl Ether, Cetearyl Alcohol, Cetyl Esters, Behentrimonium Chloride, Polysorbate 20, Isopropyl Alcohol, Hydrolyzed Wheat Protein, Hydrolyzed Wheat Starch, sh-Oligopeptide-78, Phenoxyethatnol. Potassium Sorbate, Fragrance (Parfum), Hexyl Cinnamal, Linalool, Butylphenyl Methylpropional, Geraniol, Benzyl Alcohol

Serum: Water (Aqua) (Eau), Alcohol Denat., Propylene Glycol, Polysorbate 20, Hydrolyzed Wheat Protein, Potassium Hydroxide, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Hydrolyzed Wheat Starch, sh-Oligopeptide-78, Phenoxyethanol, Potassium Sorbate, Fragrance (Parfum), Geraniol, Butylphenyl Methylpropional, Linalool, Hexyl Cinnamal, Benzyl Alcohol

Infused with notes of Jasmine, Peony & Sweet Musk

pep power

How does K18 work?

K18 utilizes a breakthrough patented oligopeptide (K18PeptideTM) which shuttles amino acids (the building blocks of hair) into the inner structure of the hair. Once inside the hair cortex, the unique amino-acid chain goes directly to the broken disulfide bonds to replace the lost amino acids, regenerating the bond permanently and restoring ultimate strength, resilience and softness.

What is Masque’s pH?

Serum: 7.5 - 8.0 

Masque: 5.0-6.0 


Who is K18 Serum & Masque for?

Anyone with hair damaged by bleaching, coloring, chemical straightening/relaxing or perming.

Why is K18 Serum applied before coloring/bleaching?

Use K18 Serum before bleach or color services to prep the cuticle layers for penetration of the restorative K18PeptideTM. Its liquid formulation optimizes the efficacy of K18PeptideTM so that the hair is in its strongest and most resilient state during the service. It will not affect the outcome of the color or bleach. 

Its lightweight formulation works on the inside of the hair strand, so it does not leave any coating or residue on the hair that could alter the effectiveness of the chemical treatment. 

What would happen if I put K18 Masque or Serum into lightener?

No benefits have been found from adding K18 to lightener. It’s meant to directly protect and strengthen hair before and after coloring/bleaching. It does not need to be added into color or bleach. 

Will applying toner on top of K18 Masque affect the outcome of my color?

No, in fact, our colorists say that K18 Masque actually improves the outcome as it fills in porosity to make the color application more uniform and consistent.  

How much K18 Masque should I use?

The amount of Masque needed will vary depending on hair type, thickness, and condition. Refer to the chart below as a guide.  

Do you suggest using a clarifying shampoo prior to using K18? Will it work if there is a lot of product or build up on the hair?

No, clarifying is typically not needed. However as the professional, we ask that you use your judgement. If there is an extreme coating of product or mineral buildup on the hair, you may choose to use a clarifier prior to using K18 in order to ensure best results. 

Can you use a built-in bonder lightener with K18?

Yes, but there’s no need! K18 Serum optimizes hair strength in order to keep hair resilient during the color/bleach service. K18 Masque is used after the service to regenerate the bonds that were broken. The products work as a team to ensure hair is completely protected and repaired, with no need for additional bonders. 

Can I use all Hydrogen Peroxide with K18 Products?

Yes, you may use all volume (%) of hydrogen peroxide per the recommendation of the company/manufacturer’s instructions. There is no need to alter your timing or bump up your volume of developer when using K18 products. 

What’s the difference between Acidic toners and K18?

K18 will give all of the great conditioning and acidic balancing results similar to an acidic toner. It can be added as an additional step before toning for even more benefits. 

Will alkaline hair color affect the performance?

Alkaline hair color swells cuticle layers and imbalances pH levels, however the great benefits of using K18 before and after these services is the ability to bring the pH level back down closer to hair’s natural pH. 

Can I use K18 during a perm?


  1. To prep the hair, lightly mist with water.
  2. Apply Serum section by section
  3. Wait 4 minutes. Do not rinse. Use this time to prepare your perm solution.
  4. Apply perm solution as usual directly on top of Serum.  
  5. Shampoo and rinse.  Skip the Conditioner.  Towel dry thoroughly.
  6. Apply Masque (see chat below).
  7. Wait 4 minutes. Do not rinse. 

If cutting: begin right away.  Wait 4 minutes before layering styling products or heat styling. 

Are the products Keratin Treatment safe?

We did not design K18 products to be used as part of a keratin service. But, they are great to use after a keratin service. Your client can start using K18 after their first shampoo at home. 

Is K18 Peptide a replacement for a conditioner?

K18’s primary goal is to regenerate broken bonds in order to rebuild and restore strength and elasticity to your hair. Any detangling or conditions benefits are a bonus. As long as you leave Masque in for 4 minutes, you can add a leave in conditioner if desired. Most people find they get all of the conditioning they need from using K18 Masque without conditioner. 

Why do you use the product on towel dried hair?

K18Peptide is not able to correctly attach bonds in the presence of too much water inside the cortex. However, the hair needs to be slightly damp to help with the penetration of the product into the cortex. 

Can I use styling products with K18?

You can layer styling products on top of K18 Masque after the 4 minute processing time. 

Aside from bleaching, coloring and perming, what other services can I use K18 Serum?

K18 can be used on almost any client, any service. The strengthening and softening benefits can transform any hair type that has been damaged by bleach, color, chemical, or heat damage. You can use K18 as a strengthening treatment during haircuts or blowouts. You can also use K18 as part of a perming service.