Molecular Repair Leave-in Mask
Molecular Repair Leave-in Mask
Molecular Repair Leave-in Mask
Molecular Repair Leave-in Mask
Molecular Repair Leave-in Mask
Molecular Repair Leave-in Mask
Molecular Repair Leave-in Mask
Molecular Repair Leave-in Mask
Molecular Repair Leave-in Mask K18 Boutique Deauville
Molecular Repair Leave-in Mask K18 Boutique Deauville

Molecular Repair Leave-in Mask

Regular price£58.00 GBP
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A leave-in treatment mask that works on the molecular level to reverse hair damage in just 4 minutes. The K18PEPTIDE™ is clinically proven to repair damage from bleach + color, chemical services and heat* – with immediate and lasting results to restore strength, softness, smoothness and bounce to hair.

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Repairs Damage Caused By

  • Bleach + Color
  • Heat
  • Chemical Services
more to know
  • K18PEPTIDE™ is a biotech-developed peptide that mimics hair's structure to reverse damage by reconnecting polypeptide chains and disulfide bonds broken during bleaching, color and chemical services + heat*.
  • pH-optimized (5.0-6.0) to help minimize cuticle swelling + put hair proteins in their most resilient state
  • Cream format enables easy, lightweight application across all hair types, with detangling and softening benefits
  • Vegan, color-safe, cruelty-free
key benefits

Takes damage repair further – reconnects both polypeptide chains (and as a result, also reconnects disulfide bonds) for strength along the length + width of the hair - offering comprehensive, lasting damage repair

Restores hair from even extreme damage - by working at the innermost layer of the hair, core strength and elasticity are renewed for strong, smooth, bouncy hair

Delivers immediate and lasting results – hair is repaired from the first use and lasts past your next wash, for ongoing reparative benefits

Simplified repair - convenient, leave-in formula works in just 4 minutes, with no extra rinse required

Works on all hair types – because K18PEPTIDE™ works on a molecular level (where all hair is the same), this product is effective on all hair types

how to use
  1. Shampoo, do not condition. Towel-dry thoroughly
  2. Apply 1-3 pumps of K18 leave-in molecular repair hair mask based on your length and density, starting at the ends and working up towards the roots
  3. Let sit for 4 minutes. Do not rinse out
  4. Comb, add product + style as usual. Use for 4-6 washes post-salon service, then as needed
dos and don'ts

✔️ 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

ingredients

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.

Disclaimer

Healthier Hair in 4 minutes¹
¹healthy hair - We define healthy hair as hair that exhibits a combination of strength, elasticity, manageability, softness, smoothness, vibrancy, shine and is frizz free' but note that we’re not providing data as substantiation against each of the descriptors where we make healthy hair claims. This also doesn't describe 'healthiest'.
¹Results observed as improvements in hair strength and elasticity in scientific-technical testing on bleach-damaged fibers after one 4-minute application of K18 molecular repair hair mask

Reverses hair damage caused by bleach¹, color¹, chemical services¹, and heat²
Repairs hair damage caused by bleach¹, color¹, chemical services¹, and heat²
Renews hair damage caused by bleach¹, color¹, chemical services¹, and heat²
¹Results observed as improvements in hair strength and elasticity in scientific-technical testing on bleach-damaged fibers after one 4-minute application of K18 molecular repair hair mask
²Results observed as a reduction in hair breakage in scientific-technical testing on tresses damaged hair by 450℉ (232℃) heat after one 4-minute application of K18 molecular repair hair mask

Immediate and progressive results¹ ¹Results observed as a progressive reduction in hair breakage in scientific-technical testing on bleach-damaged tresses with repeated 4-minute applications of K18 molecular repair hair mask

We understand the importance of using genuine beauty products. That's why we're proud to be an authorized retailer for all the brands we carry. When you shop with us, you can be sure you're getting fresh, authentic products delivered directly from the brands themselves.

Why Choose Authorized Retailers?

Unfortunately, counterfeit and expired products are a real concern online. Shopping with unauthorized sellers puts you at risk of receiving ineffective or even harmful cosmetics.

Here's why Boutique Deauville is your trusted source for beauty essentials:

  • Guaranteed Authenticity: We source directly from brands, ensuring you receive only genuine products.
  • Fresh Inventory: Regular shipments mean you get the latest formulations with optimal shelf life.
  • Safe & Effective: Avoid the risks associated with counterfeit or expired cosmetics.

Deliveries of our packages are made without a signature. During checkout, you can add a signature for $5 if your order is less than $299. Orders $299+ will all be shipped with a Signature Included.

  • All orders are shipped using UPS or Canada Post
  • Orders will be processed within 1-2 business days, Monday to Friday.
  • Shipping can take up to 7 business days to receive depending on your location.
  • You will be notified within 24 hours of any order issues that may occur

Peak Times Disclaimer:

  • During peak times like Holidays and promotions such as Black Friday and Boxing Day, due to high order volume, your items may take longer.

If you entered your address incorrectly when making your order, we are not liable. Don't forget to enter the right shipping information!

If you have any questions, don't hesitate to contact us by email or the chat bubble in the right corner. We'll get back to you right away

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