Curly & Blonde
K18Peptide™ leave-in molecular repair hair mask
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An at-home leave-in treatment infused with the patented K18Peptide™ that works to repair even the most extreme damage, renewing hair to its most youthful, healthy state.
- Powered by the K18PEPTIDE™, engineered over 10 years in a biotech lab to work on the molecular level to rebuild hair from the inside out in just 4 minutes.
- Because the K18PEPTIDE™ works at the molecular level, it works on every single hair type
- Clinically proven to reverse hair damage from: Bleach + Colour, Chemical Services, Heat
- Restores strength, softness, smoothness, and bounce
- Immediate + progressive results
- Vegan, color-safe, cruelty-free
- Shampoo, do not condition.
- Towel-dry thoroughly.
- Begin with 1 pump of K18 mask and add more as needed depending on length, thickness, and condition. Work evenly into hair from ends to roots, one pump at a time, maximum dosage is 3 pumps.
- Let sit for 4 minutes. Do not rinse out.
- Then comb + style as usual (fine to add heat protectant or styling product now).
- Use for the first 4-6 washes, then as needed
- DO clarify before K18 if you’re a heavy product user (demineralize for mineral + metal buildup)
- DO apply on clean, damp hair
- DO wait the full 4 minutes before combing or styling
- DO add whatever styling products you love after the 4 minutes
- DO use for 4-6 shampoos consecutively for progressive results.
- DON'T use conditioner before applying K18 Mask (you can apply after the 4 min but most find they don’t need it)
- DON'T overdo it—less is more
- DON'T rinse it out
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.
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Carbon Neutral Shipping
Carbon Neutral Shipping
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Environmentally & Socially Conscious
Environmentally & Socially Conscious
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5.0 / 5.0
(1) 1 total reviews












I have been bleaching and dying my hair for years, and when I finally started taking care of it, Belle recommended this to me, and it has literally saved my hair! I use the shampoo every wash and then the mask at least once a week, and my hair can actually breathe again, thank youuu!
I have been bleaching and dying my hair for years, and when I finally started taking care of it, Belle recommended this to me, and it has literally saved my hair! I use the shampoo every wash and then the mask at least once a week, and my hair can actually breathe again, thank youuu!
I have been bleaching and dying my hair for years, and when I finally started taking care of it, Belle recommended this to me, and it has literally saved my hair! I use the shampoo every wash and then the mask at least once a week, and my hair can actually breathe again, thank youuu!