Damaged hair goes beyond aesthetics. If you think of hair like a rope, the more stress and damage it is exposed to, the more the rope starts to break and unravel. Healthy hair starts below the surface, deep in the hair’s cortex. Of course, smoother, more vibrant hair is the outcome of continued protection and repair, but the real well-being happens beyond the naked eye.

So while superficial haircare covers up signs of damage, and bond building technology temporarily reconnects disulfide bonds, the structural peptide bond damage is still there.

HOW HAIR STRAND STRUCTURE LOOKS WITH HEALTHY HAIR, CHEMICAL SERVICE DAMAGE, BREAKAGE, BOND BUILDING TECHNOLOGY, AND K18PEPTIDE(™)

Utilizing breakthrough synthetic biology, K18 engineered a lasting solution to hair damage for all hair types + salon services. It’s powered by our patented K18PEPTIDE™ to reverse bleach* + color*, chemical services*, and heat damage* in just 4 minutes. This biomimetic peptide seamlessly fits in and reconnects broken polypeptide chains at the molecular level. As a result, disulfide bonds are also reconnected for reinforced strength along the length + width of hair—offering comprehensive, lasting repair.

Now on a scientific level, your clients’ healthiest hair will have strong structural integrity, optimized pH levels, and a protein-rich cortex—all addressed in the signature K18REPAIR™.

So what makes K18 molecular repair the go-to for global hair experts?

Longer lasting, more durable repair
In-salon service with 2 steps, 4 minutes each—no extra rinse
Clinical repair in just 1 use
Lower price per service vs. multi-step alternatives
1-step client take-home

Let’s break down the radically simple innovations behind unparalleled transformations.

IMAGE OF K18 MOLECULAR REPAIR SERVICE, A 2-STEP IN-SALON SERVICE MADE OF THE PROFESSIONAL MOLECULAR REPAIR HAIR MIST AND PROFESSIONAL MOLECULAR REPAIR HAIR MASK.

what’s K18REPAIR™?

K18REPAIR™ is our 2-step in-salon service made of the PRO mist + PRO mask to reverse damage, and transform results. Powered by the reparative K18PEPTIDE™, in just one application the K18 molecular repair service strengthens and fortifies hair before services, and reverses damage after salon services, giving you the confidence to push transformations further on stronger, more resilient hair.

How K18 Molecular Repair Delivers Healthier Hair—Fast

what’s the professional molecular repair hair mist?

Reaching for the K18 professional molecular repair hair mist at the start of any service is the first step to your client’s healthiest hair. This leave-in, lightweight mist repairs existing damage to strengthen hair’s defenses and make it more resilient prior to salon services. In a single, 4-minute application of the K18 PRO mist, you can:

Fortify hair pre-service to restore up to 99% elasticity*
Improve hair’s resilience to prevent damage during and after services* for stronger hair over time*
Make color last longer + fade slower* when paired with K18 mask usage at home

We put these clinicals to the test against 5 rounds of bleach, with and without K18 PRO mist. The results speak for themselves.

BEFORE AND AFTER IMAGE OF A HAIR TRESS AFTER 5 ROUNDS OF BLEACH. THE SIDE WITH MORE VISIBLE BREAKAGE AND DAMAGE HAS NO K18 PRO MIST, AND THE SIDE WITH STRONGER HAIR HAS K18 PRO MIST.

Our PRO-exclusive mist helps services apply and perform better, leaves hair healthier, and color lasts longer. With a pH level of 7.5-8.0, it makes the treatment more efficient by swelling the hair’s cuticle, allowing the K18PEPTIDE™ to better access the core. Working in just 4 minutes, in a convenient spray-on format without emollients, it’s the first step in a healthier direction.

what’s the professional molecular repair hair mask?

Finishing your service with our professional molecular repair hair mask puts hair back in a strong state, even after damaging salon services. In a single, 4-minute application of the K18 PRO mask, you can:

Reverse hair damage caused by bleach* + color*, chemical services*, and heat*
Get immediate and progressive results*
Help minimize cuticle swelling + put hair proteins in their most resilient state after salon service or shampoo, with this pH-optimized (5.0-6.0) formula
Soften, smooth, and condition hair cream-based format

Acting as your damage reset button after services, the PRO mask renews core strength and elasticity to round out the K18 molecular repair service. With K18 in your toolkit, you can feel confident helping your clients reach their hair goals while protecting their hair health. It really is a win-win.

can my clients use K18 molecular repair at home?

Yes! Since damage is ongoing out of the salon, we created a leave-in molecular repair hair mask for every client to take home. This no-rinse formula will deliver the same durable damage repair, leaving the healthiest canvas so you can push transformations further at their next appointment.

K18’s newest molecular repair hair oil also delivers next-level damage repair, along with 24-HR frizz control* and 450°F (232°C) heat protection*. By sending your clients home with the at-home K18 routine, they can have the cleanest, healthiest hair out of the salon too. Use the oil after either of K18’s color-safe shampoos, and your clients can clear the path for maximum molecular repair results.

*Disclaimers