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damage repair essentials
step 1. prep for repair
clarify hair + scalp: just one wash removes 99% product buildup, 95% sebum + 76% copper*
scalp camera closeup detox shampoo before + after
step 2. repair
maximize your repair
get stronger, more resilient hair
step 3. repair damage to fight frizz
78% reduction in split ends*
highly concentrated formula: start with 1-3 drops, build as needed.
works for all hair types
Where K18 molecular repair works
K18 routine guide
4.7
Rated 4.7 out of 5 stars
42 Reviews

damage repair essentials

Travel-friendly mini trio solves damage + frizz from the inside out
OR

Description

Kickstart cleaner, stronger, smoother hair for all hair types with award-winning, peptide-powered breakthroughs.

  • PEPTIDE PREP™ detox shampoo removes buildup + metals to help K18 mask reach the innermost layers of your hair.

  • Leave-in molecular repair hair mask repairs damage inside + out in just 4 minutes. 

  • Molecular repair hair oil fights frizz from within for immediate + long-term frizz control.

This 3-step mini set solves damage + frizz from the inside out with K18-patented biotechnology.

Start with our color-safe detox shampoo to clarify product buildup, excess oil + metals. Follow with the leave-in molecular repair hair mask to reverse bleach* + color*, chemical services* + heat* damage in 4 minutes. Finish with the weightless molecular repair hair oil to defrizz, soften, add shine + provide 450°F (232°C) heat protection*.

*Disclaimers

Just one use of PEPTIDE PREP™ detox shampoo removes*:
99% of product buildup
95% of sebum
76% of copper

One use of leave-in molecular repair hair mask delivers*: Healthier hair in 4 minutes

One use of molecular repair hair oil delivers*:
Clinically proven damage repair
24-HR frizz control
104% more shine
78% reduction in split ends
450°F (232°C) heat protection

*Disclaimers

Begin with detox shampoo

  1. Massage detox shampoo into hair + scalp to remove excess buildup.
  2. Thoroughly rinse.
  3. Repeat as needed.
  4. Skip conditioner.

Apply the leave-in molecular repair hair mask

  1. Towel-dry thoroughly.
  2. Begin with 3 pumps of K18 leave-in molecular repair hair mask and add more as needed. Maximum recommended usage is 9 pumps.
  3. Apply all over, 1 pump at a time.
  4. Let sit for 4 minutes. Do not rinse out.

Finish with the molecular repair hair oil

  1. Apply 1-3 drops of molecular repair hair oil to damp hair, starting at the ends and working upward through the mid-lengths.
  2. Wait 4 minutes. Style as usual.
  3. Apply an additional 1-3 drops of molecular repair hair oil to dry hair as a finisher.

A little goes a long way with our highly concentrated formulas. Start with the minimum recommended amount + build as needed.

PEPTIDE PREP™ detox shampoo
Water (Aqua) (Eau), Sodium C14-16 Olefin Sulfonate, Cocamidopropyl Hydroxysultaine, Salicylic Acid, Charcoal Powder, sh-Oligopeptide-78, Panthenol, Glycerin, Sodium Phytate, GuarHydroxypropyltrimonium Chloride, Caprylyl Glycol, Caprylhydroxamic Acid, Citric Acid, Potassium Hydroxide, Sodium Hydroxide, Fragrance (Parfum), Benzyl Salicylate, Limonene.

leave-in molecular repair hair mask
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.

molecular repair hair oil
Caprylyl Caprylate/Caprate, Squalane, Persea Gratissima (Avocado) Oil, Helianthus Annuus (Sunflower) Oil, C13-15 Alkane, Undecane, Benzyl Alcohol, Tridecane, Castor Isostearate Succinate, Propanediol, sh-Oligopeptide-78, Fragrance (Parfum), Tocopherol, Cinnamal, Hexyl Cinnamal, Limonene, Linalool.

pairs well with
AirWash™ dry shampoo
4.6
Rated 4.6 out of 5 stars
420 Reviews
Revolutionary dry shampoo reduces oil + odor—weightlessly.
DAMAGE SHIELD protective conditioner
4.6
Rated 4.6 out of 5 stars
252 Reviews
Nourishing conditioner shields hair from daily damage

Description

Kickstart cleaner, stronger, smoother hair for all hair types with award-winning, peptide-powered breakthroughs.

  • PEPTIDE PREP™ detox shampoo removes buildup + metals to help K18 mask reach the innermost layers of your hair.

  • Leave-in molecular repair hair mask repairs damage inside + out in just 4 minutes. 

  • Molecular repair hair oil fights frizz from within for immediate + long-term frizz control.

got questions?
Get started here
Yes, it is better to use the full K18 routine for optimal service and molecular repair results.

To achieve the best cumulative results, we recommend using these routines:
when you need to repair damage: detox shampoo + mask
when you need to protect against daily damage: DAMAGE SHIELD shampoo + conditioner
every day: molecular repair hair oil
between wash days: AirWash™ dry shampoo

Before K18 molecular repair mask or oil, our PEPTIDE PREP™ detox shampoo tackles buildup + metals to create the cleanest, healthiest hair canvas. With our molecular repair formulas, you get maximum damage repair plus additional styling benefits with the oil. Use the DAMAGE SHIELD shampoo + conditioner to protect hair from daily damage between K18 mask days—and keep healthy hair going in-between salon appointments. Use AirWash™ dry shampoo to refresh hair between washes with an instant, weightless clean.
No, the detox shampoo will not dry your hair out. This non-stripping formula has a pH of 3.8-4.2 that won’t leave hair over-stripped. In a consumer study, 90%* said hair feels clean without feeling dry. *Disclaimers
The molecular repair hair mask and oil work together to give you the reparative benefits of the K18PEPTIDE™ in both formulas. The oil will add additional frizz-reducing, styling, and heat-protecting properties. You can layer the oil on top of the mask after the 4-minute processing time.
No, the mask will not block the molecular repair hair oil from penetrating. The mask is a highly concentrated treatment without any fillers so it won’t block the oil from penetrating. Like layering different skincare products, the oil can be layered on top of the mask without impacting its performance.
Our biomimetic peptide mimics hair’s natural structure to seamlessly fit in and reconnect broken keratin chains responsible for hair’s core strength and elasticity. As a result of this reconnection it also addresses cleaved disulfide bonds for connection along the Y-axis of hair AND the X-axis or width of hair.
Straight bleached hair after using K18 mask.
Straight bleached hair before using K18 mask.

see molecular repair in action

The K18 leave-in molecular repair hair mask delivers lasting + progressive results, for healthier hair with each use.
the K18 difference
Feel what’s possible with fewer steps, less waste + less time.
efficacy
patented K18PEPTIDE™ powers deeper + lasting repair.
simplicity
fewer steps for a streamlined routine.
speed
results in one 4-minute use.
how molecular repair compares
how K18 works

Traveling into the innermost layers of hair, our K18PEPTIDE™ renews strength along the width AND length of hair for lasting strength where it matters.

4.7
Rated 4.7 out of 5 stars
Based on 42 reviews
42 reviews
  • Angela
    Verified Buyer
    I recommend this product
    Age 35 - 44
    Hair Concern Dryness, Color-care, Chemical damage, Split-Ends
    Hair Type Fine/Thin
    My Results Stronger Hair, Cleaner, fresher hair, Shinier Hair, Smoother Hair, Soft Touchable Hair
    Rated 5 out of 5 stars
    2 weeks ago
    Results after 1st use and amazed at wash 4

    My colored fine hair became dull and fried at my lengths and ends and oily at my scalp. I’ve balayaged my hair for years am amazed at the improvements K18 is making, I can’t remember my hair being this healthy before! I HIGHLY recommend following Abbey Yung on YouTube who demonstrates how to get the best results - she emulsifies her hands and conditions after, and I’ve been following her method.

    Before is the first photo after is the building photo

    K Profile picture for K18Hair
    K18Hair
    2 weeks ago

    Thank you Angela! We appreciate your review! Healthy hair one treatment at a time!

  • AMY J J.
    Verified Buyer
    I recommend this product
    Age 45 - 54
    Hair Concern Frizz, Fragile/brittle hair, Split-Ends, Chemical damage, Heat damage
    Hair Type Fine/Thin
    My Results Visible Difference, Less Frizz, Cleaner, fresher hair, Oil absorbed
    Rated 5 out of 5 stars
    1 month ago
    A+!

    I noticed just after one routine of washing, and applying! I was actually feeling and seeing the softness it left immediately!

    K Profile picture for K18Hair
    K18Hair
    1 month ago

    We appreciate your A+ score! 💛 We appreciate your review!

  • Evelyn W.
    Verified Buyer
    I recommend this product
    Age 45 - 54
    Hair Concern Frizz, Split-Ends, Dryness, Fragile/brittle hair
    Hair Type Curly/Coily, Medium Density
    My Results Less Frizz, Visible Difference, Defined Curl/Wave Pattern, Smoother Hair, Shinier Hair
    Rated 5 out of 5 stars
    1 month ago
    After my First Use

    After the very first use I could see and feel a huge difference in my hair texture. It was super soft, hair shafts were more smooth, plenty of shine, my scalp felt amazingly good, and my hair has been so much easier to manage. I have 3c, 4a, and 4b hair, hopefully after my 6th wash I'll at least have just two types..lol. Thank you K18!!! Oh AND LESS FRIZZ!!!

    K Profile picture for K18Hair
    K18Hair
    1 month ago

    Thank you for your review! Soft hair and frizz free feels amazing!

  • Georgina P.
    Verified Buyer
    I recommend this product
    Age 55 - 64
    Hair Concern Fragile/brittle hair, Dryness, Oily hair/scalp
    Hair Type Fine/Thin
    My Results Bouncy Hair, Less Frizz, Shinier Hair, Smoother Hair, Soft Touchable Hair
    Rated 5 out of 5 stars
    3 months ago
    Perfect travel size

    I am so pleased with the results of all the K18 products so far, and this little travel kit is just perfect for up to a two week vacation. My hair is softer and shinier. I save K18 for special occasions like vacations and special events because of the cost.

    K Profile picture for K18Hair
    K18Hair
    2 months ago

    ​To help with saving money on K18 we recommend our subscription. Your first order is 10% off, then 15% for the remaining orders, and the best part is you can cancel at any time. Thank you for your review!

  • Reyna A.
    Verified Buyer
    I recommend this product
    Age 25 - 34
    Hair Concern Chemical damage, Dryness, Split-Ends
    Hair Type Fine/Thin, Straight/Wavy
    My Results Visible Difference, Less Breakage, Stronger Hair, Shinier Hair
    Rated 5 out of 5 stars
    3 months ago
    Amazing progress

    The hair mask is one of the most incredible things I’ve ever tried, after applying the hair mask my hair feels great , it doesn’t feel or look dry at all.

    Excellent size to try out and Amazing price for the 3 of them

    K Profile picture for K18Hair
    K18Hair
    3 months ago

    We appreciate your review! We agree this size is perfect to test them out.

Reviews LoadedReviews Added
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