See How K18 Haircare Compares To Other Falsies


“Unlike traditional haircare that only masks damage, K18 works at the molecular level with biomimetic peptide technology to actually repair hair from the inside out"

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Repairs Hair at Molecular Level
Long-lasting Results
Stops Breakage & Split Ends
Color Safe
Lightweight, No Build-Up
Time Efficient
Cumulative Effect

Repairs Damage from Bleach, Color & Heat — Instantly!

    K18 Leave-In Molecular Hair Mask

    Repairs dry or damaged hair, reversing damage from bleach, color, chemical services & heat.

    K18 Hair Mask Usage
    Transforms Damaged Hair

    Clinically proven to repair hair at a molecular level for stronger, healthier strands.

    Works on All Hair Types
    Works on All Hair Types

    Curly, straight, thick, or fine—this treatment adapts to every hair texture.

    Before and After
    Visible Before & After

    Instantly improves smoothness, shine, and manageability for salon-quality results.

    K18 Product
    Lightweight & Easy to Use

    Leave-in formula works in just 4 minutes—no rinse required, no heavy build-up.

    From Damaged to Transformed

    92%

    saw softer, smoother hair after just one use

    91%

    noticed lasting hydration and shine

    95%

    said their hair felt stronger and healthier

    89%

    saw visible repair from bleach & color damage

    98%

    reported reduced breakage and split ends

    88%

    felt more confident in their hair’s appearance

    Trusted by thousands who repaired their hair with K18.

    See The K18 Difference

    After Result Before Result (Simulated) Before After

    How to use molecular repair mask

    1. Shampoo, do not condition. Towel-dry thoroughly.
    2. Apply 1-3 pumps 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 styling product + style as usual. Use for 4-6 washes, then as needed.

    What Our Customers Say

    Review 1
    ★★★★★
    Verified Review

    "Absolutely amazing! My hair feels so much healthier and softer after just a few uses."

    – Sarah, USA

    Review 2
    ★★★★★
    Verified Review

    "I noticed a huge difference in smoothness and shine. Feels like a salon treatment at home!"

    – Mia, UK

    Review 3
    ★★★★★
    Verified Review

    "Best hair mask I’ve tried! Repairs damage without weighing down my hair."

    – Olivia, Canada

    Frequently Asked Questions

    Everything you need to know about the K18 Haircare™ Leave-In Molecular Repair Mask.

    What makes K18 different from other hair masks?
    Most masks give surface slip. K18 works on the molecular level with the patented K18PEPTIDE™ to reconnect broken keratin chains—restoring strength, elasticity, smoothness, and bounce in just 4 minutes.
    How do I use the K18 Hair Mask?
    Shampoo (skip conditioner), towel dry, apply 1–3 pumps from roots to ends, wait 4 minutes, leave in, and style as usual.
    Is it for all hair types?
    Yes—straight, wavy, curly, coily; fine or thick; natural or chemically treated.
    Safe for color-treated and bleached hair?
    Absolutely. It’s clinically proven to reverse bleach + color damage and is used by pros during services.
    How often should I use it?
    Use every wash for the first 4–6 washes, then every 3–4 washes to maintain results.
    Will it weigh my hair down?
    No—lightweight, leave-in, fast-absorbing. Soft, bouncy finish without residue.
    Is K18 vegan and cruelty-free?
    Yes—K18 is vegan and cruelty-free.
    How long will the 50mL last?
    A little goes a long way—typically several weeks to months depending on length, density, and frequency.