K18 Damage repair starter setThis science-powered set delivers cleaner, healthier, and frizz-free hair.

Start with our colour-safe detox shampoo to clear product buildup, excess oil, and metals from hard water. Follow with the bestselling leave-in molecular repair hair mask—powered by the K18PEPTIDE™ and clinically proven to reverse damage from bleach + colour, chemical services, and heat* in 4 minutes. Finish with the oil, a strengthening defrizz solution that softens, adds shine, reduces split ends, and provides 450°F (232°C) heat protection*.

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

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 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.
4. 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.

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is it better to use the full k18 routine?

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.

K18 molecular repair + PEPTIDE PREP™ shampoos are formulated with the K18PEPTIDE™. In our molecular repair products, the peptide works at the innermost layers to reverse hair damage. In our PEPTIDE PREP™ shampoos, the peptide helps reduce protein loss to help keep hair feeling healthy and strong.