Molecular Repair Hair Oil
Molecular Repair Hair Oil
Molecular Repair Hair Oil
Molecular Repair Hair Oil
Molecular Repair Hair Oil
Molecular Repair Hair Oil
Molecular Repair Hair Oil
Molecular Repair Hair Oil
Molecular Repair Hair Oil
Molecular Repair Hair Oil
Molecular Repair Hair Oil
Molecular Repair Hair Oil
Molecular Repair Hair Oil
Molecular Repair Hair Oil
Rating 8,389 Reviews

Molecular Repair Hair Oil

Full Size - 30 mL
$65.00
Mini Size - 10 mL
$27.00

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.

Repairs Damage Caused By

  • Bleach + Color
  • Heat
  • Chemical Services

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pairs well with
K18 molecular repair hair oil
4.8
Rated 4.8 out of 5 stars
841 Reviews
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Weightless oil that strengthens, repairs damage + reduces frizz
PEPTIDE PREP™ detox shampoo
4.9
Rated 4.9 out of 5 stars
547 Reviews
Click to scroll to reviews
Color-safe, non-stripping clarifying shampoo with the K18PEPTIDE™
Molecular Repair Hair Oil

Molecular Repair Hair Oil

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.
clinically proven smoothness
24
%
said hair looks healthier*
104
%
said hair feels smoother*
78
%
said hair doesn’t feel weighed down*
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.

learn more on our blog

how to use HeatBounce conditioning heat protectant

Blow dry, curl + straighten your hair—without damage.

Meet HeatBounce: Deeper Heat Protection Than Ever Before*

Powered by new patented heat-shielding tech.

What Hot Tools Are Really Doing to Your Hair

If your routine involves heat—this one's for you.
4.6
Rated 4.6 out of 5 stars
Based on 5 reviews
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5 reviews
  • Lucy S.
    Verified Buyer
    I recommend this product
    Age 55 - 64
    Hair Concern Chemical damage, Heat damage, Color-care, Frizz, Fragile/brittle hair
    Hair Type Thick/Coarse
    My Results Visible Difference, Smoother Hair, Less Frizz, Less Breakage, Stronger Hair
    2 days ago
    Absolutely the BEST!

    This product is the best for dry course damage over processed hair. Put on towel, dried hair and blow dry and style as usual and your hair is more silky, smooth than ever imaginable!

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    K Profile picture for K18Hair
    K18Hair
    2 days ago

    We're so thrilled to hear this, Lucy! Thank you for sharing your experience with this incredible formula!

  • Melissa W.
    Verified Buyer
    I recommend this product
    Age 35 - 44
    Hair Concern Heat damage
    Hair Type Fine/Thin
    3 days ago
    Scent mask

    It’s not overpowering and fantastic change up from the original with all the great benefits of the mask!

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    K Profile picture for K18Hair
    K18Hair
    2 days ago

    It's wonderful to hear that the limited edition scent gives you that perfect balance - a fantastic change from the original without being overpowering, while still delivering all those amazing mask benefits! Thank you for sharing your experience with this special formula, Melissa!

  • Christine L.
    Verified Buyer
    I recommend this product
    Age 55 - 64
    Hair Concern Chemical damage, Heat damage, Frizz, Split-Ends, Dryness
    Hair Type Medium Density, Straight/Wavy
    My Results Less Frizz, Visible Difference, Less Breakage, Smoother Hair, Stronger Hair
    5 days ago
    The Best for Damaged Hair

    I tried this product many years ago and wasn’t really thrilled with it. However, my hairdresser continues to use many of their products and loves them. So I decided to give it another try and ordered it directly from the K-18 website. I’m not sure but I think the first time I tried it. I didn’t buy it directly from them and I think it may not have been authentic. Because this time when I tried it, it was excellent. First, I tried a small bottle and now I got a bigger bottle and I’m thinking I should’ve got the biggest bottle. Really helps with frizzy color damaged hair and split ends. I’m on my third or fourth wash and starting to notice a real difference in the texture of my hair. And it’s also. not getting tangled as much afterwards.

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    K Profile picture for K18Hair
    K18Hair
    2 days ago

    We love that you went from the small bottle to the bigger one - that's always a great sign! Thank you for sharing your experience and for trusting us with your hair care journey!

  • ANGIE P.
    Verified Buyer
    I recommend this product
    Age 25 - 34
    Hair Concern Chemical damage, Split-Ends
    Hair Type Medium Density, Straight/Wavy
    My Results Bouncy Hair, Soft Touchable Hair, Shinier Hair, Smoother Hair, Odor eliminated
    1 week ago
    Nonstop compliments

    Used this mask before a girls night and everyone was asking what I was wearing. It's a mysterious, and expensive smell, like what you'd expect from a boutique hotel. It's not overly feminine, with its peppery notes to balance the floral. As a long time mask lover, I might need to go to Future Society to purchase a bottle!

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    K Profile picture for K18Hair
    K18Hair
    1 week ago

    We're so excited to hear about all the compliments you received, Angie! It sounds like the limited edition scent was the perfect choice for your girls night. Thank you for sharing your wonderful experience!

  • Andrea
    Verified Buyer
    Age 25 - 34
    Hair Concern Heat damage, Chemical damage, Frizz, Split-Ends, Color-care
    Hair Type Fine/Thin, Straight/Wavy
    My Results Smoother Hair
    1 week ago
    Love the mask but hate the scent

    Wow…. The scent is just bad. Really bad. Not feminine at all. Smells like peppery dirt. I was Looking forward to trying it with a floral woodsy scent but instead it just smells like peppery and dirt … for $75 😭

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    K Profile picture for K18Hair
    K18Hair
    1 week ago

    Thank you for sharing your honest feedback. We’re sorry to hear the scent didn’t meet your expectations. Fragrance preference is so individual, and we appreciate you giving the product a try. We went ahead and processed a refund for your order, you should receive an email confirmation shortly.