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Molecular Repair Hair Oil
Regular price $65
Regular price $0 Sale price $65
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.
Red curly hair before and after results using k18.
dark coily hair before + after styling with k18 hair products.
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
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.
Red curly hair before and after results using k18.
dark coily hair before + after styling with k18 hair products.
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
1,066 Reviews

K18 molecular repair hair oil

Weightless oil that strengthens, repairs damage + reduces frizz

Size:
30mL
Regular price $65
Regular price $0 Sale price $65
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Color:
30mL

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molecular repair hair oil

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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

    • how to use

      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.

    • more to know

      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

    • key benefits

      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).

    • ingredients

      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, Linalyl Acetate, Pinene, Rose Ketones, Terpineol, Tetramethyl Acetyloctahydronaphthalenes.

pairs well with
Diagram showing external and internal causes of hair shedding, early graying, and scalp aging. K18 biomimetic hair science serum bottle on a gradient background
FutureIQ™ biomimetic hair longevity serum
Leave-in molecular repair hair mask 50mL
full-size leave-in molecular repair hair mask
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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.
Red curly hair before and after results using k18.
dark coily hair before + after styling with k18 hair products.
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
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.
Red curly hair before and after results using k18.
dark coily hair before + after styling with k18 hair products.
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
got questions?

still have questions? visit our help center

Can i use the molecular repair hair oil instead of the mask?

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.

Does the molecular repair hair oil provide heat protection?

Yes, this oil provides heat protection up to 450°F/232°C.

Will the molecular repair hair oil leave buildup or weigh down my hair?

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

Will the mask block the molecular repair hair oil from penetrating?

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.

Can I mix the oil and mask together?

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.

immediate + lasting frizz control

Boost shine and seal split ends on all hair types—weightlessly.

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after
"I normally don't use hair oils as my hair gets naturally oily....I loved the end result! I will officially be adding this hair oil to my routine"
- Fabiola N.
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before
after
"I use this alllll the time. It's truly saved my hair....And it's so gorgeous and shiny and the thickness is returning nicely."
- Emma L.
before afer
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after
"It makes my hair much smoother after it’s been so damaged."
- Crystal A.
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after
"So far so good, used it around 4 times and my hair looks shinier and has less frizz"
- Anel
clinically proven smoothness
24
hour frizz control*
104%
more shine*
78%
reduction in split ends*
450
degree heat protection*
how to use molecular repair oil

Highly concentrated formula. Start with 1-3 drops and build as needed.
1. Apply 1-3 drops to towel-dried hair from mid-lengths to ends.
2. For strengthening benefits from the K18PEPTIDE™, wait 4 minutes before styling.
3. Apply 1-3 drops to dry hair as a finisher.

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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 1,066 reviews
95%would recommend these products
Reviews Summary
Customers say this hair oil delivers exceptional results with just a few drops. Many reviews highlight its lightweight formula that works well for both fine and thick hair types. The oil effectively tames frizz and flyaways while adding softness and shine without feeling greasy. Users particularly appreciate how it smooths dry ends and works well on various hair textures. While most find it highly effective, some mention the scent is noticeable and a few note the price point is high. Common feedback emphasizes that a small amount goes a long way, making the product last longer than expected.
Customers Talked About
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1,066 reviews
  • Dina H.
    Verified Buyer
    Reviewing
    Molecular Repair Hair Oil
    I recommend this product
    Age 35 - 44
    Hair Concern Fragile/brittle hair, Frizz, Split-Ends
    Hair Type Straight/Wavy, Medium Density
    My Results Less Frizz, Defined Curl/Wave Pattern, Smoother Hair
    Rated 5 out of 5 stars
    1 year ago
    Miracle worker

    This oil is just divine. I have wavy/slightly curly hair. Every time I feel like it is starting to look dull or disheveled,, a couple of tiny drops of this totally revitalizes it.

    Featured
    Was this helpful?
    K Profile picture for K18Hair
    K18Hair
    1 year ago

    We appreciate your review! Thank you!

  • Linda N.
    Verified Buyer
    Reviewing
    Molecular Repair Hair Oil
    I recommend this product
    Age 65+
    Hair Concern Color-care, Dryness
    Hair Type Grey Hair
    My Results Shinier Hair
    Rated 5 out of 5 stars
    4 hours ago
    Pricey but SO worth it!

    Best hair oil I've used - and it doesn't take much.

    Was this helpful?
    K Profile picture for K18Hair
    K18Hair
    3 hours ago

    We're so happy you love the Molecular Repair Hair Oil! 💚 Thanks for sharing that you're getting amazing results. We appreciate your support!

  • Jon S.
    Verified Buyer
    Reviewing
    Molecular Repair Hair Oil
    I recommend this product
    Age 55 - 64
    Hair Concern Color-care, Frizz
    Hair Type Thick/Coarse
    My Results Less Frizz, Smoother Hair, Visible Difference
    Rated 5 out of 5 stars
    21 hours ago
    A little goes along way

    This oil gives you a nice sheen. I don’t use much and it adds that

    Smoothness to the ends. Give it a try.

    Was this helpful?
    K Profile picture for K18Hair
    K18Hair
    19 hours ago

    Thank you so much for your amazing review! We're thrilled to hear that our Molecular Repair Hair Oil gives you that perfect sheen and smoothness. Your support means everything to us! ✨

  • Vicki H.
    Verified Buyer
    Reviewing
    Mini molecular repair hair oil
    I do not recommend this product
    Age 55 - 64
    Hair Concern Color-care, Frizz, Dryness, Heat damage, Chemical damage
    Hair Type Fine/Thin
    My Results Bouncy Hair, Less Frizz, Visible Difference, Less Breakage, Stronger Hair
    Rated 1 out of 5 stars
    Yesterday
    Never received my product

    Wouldn’t know!!! I never recieved my product ugh

    Was this helpful?
    K Profile picture for K18Hair
    K18Hair
    10 hours ago

    Hi Vicki, thank you for reaching out and we're really sorry to hear that you didn't receive your Mini Molecular Repair Hair Oil. Please reach out to our Customer Care team at hello@k18hair.com with your order details, and we'll be happy to look into this right away.

  • Argentina C.
    Verified Buyer
    Reviewing
    Molecular Repair Hair Oil
    I recommend this product
    Age 35 - 44
    Hair Concern Chemical damage, Heat damage, Color-care, Split-Ends, Frizz
    Hair Type Fine/Thin, Curly/Coily, Medium Density
    My Results Less Breakage, Soft Touchable Hair, Visible Difference, Defined Curl/Wave Pattern, Less Frizz
    Rated 5 out of 5 stars
    Yesterday
    Best oil!

    My dark brown curly hair gets re-touched and dyed to copper several times a year, and these have helped keep it SOFT and HEALTHY. A little goes a LONG WAY, so literally start with what it says- a couple of drops.

    Was this helpful?
    K Profile picture for K18Hair
    K18Hair
    Yesterday

    Thank you so much for your amazing review! We're thrilled to hear that our Molecular Repair Hair Oil is keeping your beautiful copper curls soft and healthy. Your support means everything to us! 💖✨

*Disclaimers

10