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molecular repair hair oil
one use of molecular repair hair oil delivers: clinically proven damage repair, 24-hr frizz control, 104% more shine, 78% reduction in split ends, and 450F heat protection
Bleach blonde hair before and after results using k18.
Mini molecular repair hair oil
Mini molecular repair hair oil
Grey curly hair before and after results using k18.
highly concentrated formula. start with 1-3 drops, build as needed.
silicone-free weightless oil is powered: K18PEPTIDE(TM), Avocado Oil, Sunflower Oil, Hemisqualane + Squalane.
how damage + frizz related? before + after of outer and inner layer
are you using K18 mask today?
K18 vs. other oils
Mini versus full size product comparison
K18 routine guide
4.8
Rated 4.8 out of 5 stars
757 Reviews

mini molecular repair hair oil

Weightless oil that strengthens, repairs damage + reduces frizz
OR

Description

This biotech-engineered weightless oil works on all hair types to strengthen, repair damage, reduce frizz at two levels of the hair fiber, and improve shine.

  • clinically proven damage repair
  • 24-HR frizz control
  • 104% more shine
  • 78% reduction in split ends
  • 450°F (232°C) heat protection

Strengthening, smoothing hair oil works on two levels of the hair fiber to fight frizz.

The K18PEPTIDE™ works to address deeper-level damage that causes frizz—repairing and strengthening damage at the innermost layer of hair to reverse damage that leads to frizz.

On the surface of hair, natural oils like avocado and sunflower oil, and hemisqualane and squalane nourish while smoothing frizz + flyaways to improve color vibrancy, enhance shine, and provide 450°F (232°C) heat protection.

  • Clinically proven to repair damaged hair.*
  • 24-HR frizz control*
  • 104% increase in shine*
  • 78% reduction in split ends*
  • 450°F (232°C) heat protection*

*Disclaimers

This silicone-free oil fights frizz differently by addressing the damage that causes frizz long-term and immediately smoothing frizz + flyaways.

  • Reverses frizz-causing damage: Works at the molecular level to repair damaged hair, which is more susceptible to frizz.
  • Reduces frizz + flyaways: Natural oils work on the surface of the hair to smooth the cuticle + soften without weighing hair down.
  • Enhances shine + color vibrancy: Nourished, moisturized hair reflects higher shine and boosts color dimension.
  • Delivers heat protection: to prevent further frizz-causing damage up to 450°F (232°C).

Apply to damp, towel-dried hair before styling, or on dry hair as a finisher. Highly concentrated formula. Start with 1-3 drops and build as needed.

Use on damp hair for: strengthening benefits and to reduce frizz during air-dry or styling.

Use on dry hair to: smooth frizz and flyaways, as a finisher to add shine.

  • Apply to damp hair from mid-lengths to ends. For strengthening benefits from the K18PEPTIDE™ wait 4 minutes before styling.
  • Apply to dry hair as a finisher.

Pro Tip - If using the K18 molecular repair mask, apply the mask first on clean, damp hair, then wait 4 minutes. Apply the molecular repair hair oil, and wait 4 minutes for maximum strengthening results.

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
bestseller
full-size leave-in molecular repair hair mask
4.7
Rated 4.7 out of 5 stars
8,127 Reviews
4-minute leave-in treatment to reverse hair damage

Description

This biotech-engineered weightless oil works on all hair types to strengthen, repair damage, reduce frizz at two levels of the hair fiber, and improve shine.

got questions?
Get started here.
We recommend using the oil with the mask for maximum molecular repair with additional styling benefits. Think of the mask as a damage repair treatment after washing your hair. The oil is for smoothing, styling and strengthening after the mask, and can be used on damp and dry hair.
Yes, this oil provides heat protection up to 450°F/232°C.
No, it will not leave buildup or weigh down your hair. This weightless oil is powered by intentional ingredients to reduce frizz-causing damage on the molecular level inside the hair fiber, while natural oils work on the surface of hair without weighing it down.

Plus, you don’t need much of this highly concentrated formula to see results, just use 1-3 drops and build as needed. If you’re concerned about buildup, use our detox shampoo to remove 99% of product buildup after just 1 wash*.
*Disclaimers
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.
Instead of mixing the oil and mask together, get the most effective repair and styling benefits by using the mask first, waiting 4 minutes, and then applying the oil.
how to use it
PRO stylist + educator Carly Zanoni shows you how to apply the molecular repair hair oil.
PRO stylist + educator Eric Vaughn shows you how the K18 leave-in molecular repair hair mask + oil work together in your routine.
molecular repair
hair oil vs. mask
Do you use one over the other? Both? Glad you asked! Both are meant to be used at different parts of the routine but were created to work together for maximum impact
molecular repair oil
what it is: weightless, silicone-free hair oil

what it does: reverses damage that causes frizz long-term while immediately smoothing flyaways, adding shine, and reducing split ends

when to use: on damp or dry hair throughout styling
bestseller
molecular repair mask
what it is: leave-in treatment

what it does: reverses hair damage in 4 minutes for lasting + progressive results

when to use: after shampoo, on damp, towel-dried hair before styling
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.

feel what's possible with K18
See how K18 unlocks our community's expression
4.8
Rated 4.8 out of 5 stars
Based on 757 reviews
757 reviews
  • Jennifer B.
    Verified Buyer
    Reviewing
    hair oil sample
    I recommend this product
    Rated 5 out of 5 stars
    Yesterday
    Best hair oil and protection for my hair

    Love this oil helps.my hair so much, I wasnt fosure about this hair oil, as I've tried many in the past! This is the best hair oil I've tried and I can't wait to buy the full-size.

    K Profile picture for K18Hair
    K18Hair
    Yesterday

    We agree! Thank you Jennifer!

  • Morgan P.
    Verified Buyer
    Reviewing
    Mini molecular repair hair oil
    I recommend this product
    Age 25 - 34
    Hair Concern Dryness
    Hair Type Fine/Thin
    My Results Cleaner, fresher hair
    Rated 5 out of 5 stars
    3 days ago
    So helpful!

    Love it! So nice and healthy

    K Profile picture for K18Hair
    K18Hair
    Yesterday

    Thank you for your 5-star review!

  • Lauren M J.
    Verified Buyer
    Reviewing
    hair oil sample
    I recommend this product
    Rated 5 out of 5 stars
    1 month ago
    Great final touch for processed hair!

    I lighten and color my hair a lot, so this oil has been a life saver for my ends. I use it after the mask after washing my hair.

    K Profile picture for K18Hair
    K18Hair
    4 weeks ago

    We love that our Molecular Repair oil is buildable and can be added as needed to smooth hair and before restyling. We appreciate your review!

  • Jennifer S.
    Verified Buyer
    Reviewing
    Mini molecular repair hair oil
    I recommend this product
    Age 45 - 54
    Hair Concern Chemical damage, Color-care, Frizz, Split-Ends, Dryness
    Hair Type Medium Density, Straight/Wavy
    My Results Less Frizz, Less Breakage, Smoother Hair, Soft Touchable Hair, Shinier Hair
    Rated 5 out of 5 stars
    1 month ago
    Love this hair oil

    This hair oil is the best, my hair feels so soft and shiny!

    K Profile picture for K18Hair
    K18Hair
    4 weeks ago

    We agree it is the best! Thank you for your review!

  • Shauna R.
    Verified Buyer
    Reviewing
    Molecular Repair Hair Oil
    I recommend this product
    Age 55 - 64
    Hair Concern Chemical damage
    Hair Type Medium Density
    My Results Visible Difference, Smoother Hair, Shinier Hair, Soft Touchable Hair, Less Frizz
    Rated 5 out of 5 stars
    1 month ago
    i love my hair again

    my hair was looking bad k18 fixed my hair it’s heathy and shinny looking again

    thank you k18 nothing compares to k18 i love it

    K Profile picture for K18Hair
    K18Hair
    4 weeks ago

    We love this for you! Thank you Shauna!

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