Free Standard Shipping on $125+ Orders
free returns. buy with confidence

molecular repair hair oil

Weightless oil that strengthens, repairs damage + reduces frizz
Rated 4.8 out of 5
Based on 265 reviews
30 mL

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

Professional Only

Log In / REGISTER

Every purchase supports K18 x Plastic Bank efforts to radically simplify waste.
In 2023 we stopped 147 Metric tons of plastic
=
7.3M+ single-use plastic bottles from reaching the ocean

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)

how to use in the salon

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

For Stylist Use

Begin with PRO chelating hair complex:

  1. Section dry hair into 4 quadrants.
  2. Apply 6-10 sprays of K18 pro chelating hair complex per quadrant*.
  3. Wait 4 minutes after chelating (do not rinse out)

Apply the PRO molecular repair hair mist:

  1. Apply a minimum of 10 full sprays of K18 professional molecular repair hair mist to each quadrant, increasing up to 20 sprays per quadrant as needed, depending on client’s length, density, and level of damage.
  2. Wait 4 minutes (do not rinse out). If needed, dry the hair prior to applying lightener or color. Then perform your desired technique.

Apply the PRO molecular repair hair mask:

  1. Shampoo (do not condition) and towel dry thoroughly.
  2. Apply 1-3 pumps of K18 professional molecular repair hair mask based on your client’s length and density, starting at the ends and working up towards the roots.
  3. Let sit for 4 minutes (do not rinse out).

Finish with the molecular repair hair oil

  1. Apply 1-3 drops of K18 molecular repair hair oil to damp hair, starting at the ends and working upward through the mid-lengths.
  2. Wait 4 minutes. Style as usual.
  3. Apply an additional 1-3 drops of K18 molecular repair hair oil to dry hair as a finisher.

*For cases of extreme metal + mineral buildup, process up to 10 minutes, then proceed with the instructions.

**For best results, we recommend to use K18 chelator before every service. If not using K18 chelator, lightly dampen hair with water (do not saturate) before applying K18 PRO mist.

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.

for client use

Highly concentrated formula. Start with 1-3 drops and build as needed.

  • 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 - Got the K18 molecular repair mask? Use 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.

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.

pairs well with

K18REPAIR™ service

Rated 4.8 out of 5
Based on 1741 reviews
2-step PRO mist + mask service reverses damage in 4 minutes View K18REPAIR™ service (WHOLESALE) product Log In / REGISTER

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.

Does the molecular repair hair oil work on all hair types?

Yes, the molecular repair hair oil works on all hair types.

Does the molecular repair hair oil provide heat protection?

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

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 that would block the oil from penetrating. Like layering different skincare products, the oil can be layered on top of the mask without impacting its performance.

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

No, it will not leave buildup or weigh down 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 or your clients are concerned about buildup, use our detox shampoo to remove 99% of product buildup after just 1 wash*.
*Disclaimers

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.

how to use + sell it

  • how to use
  • how to sell the oil to clients
PRO stylist + educator Carly Zanoni shows you how to use the molecular repair hair oil to strengthen and smooth your hair + your client’s.
PRO stylist + educator Eric Vaughn chats his favorite things about the molecular repair hair oil + why every client needs it.

plays well with others

The molecular repair hair oil works on its own and can be paired with the molecular repair service.
what's the difference?
Think of the molecular repair service as damage repair treatments used before and after services. The oil is for smoothing, styling, and strengthening after the mask, and can be used on damp and dry hair.
why wouldn't I just use the oil?
We recommend using the oil with the molecular repair service to get maximum molecular repair results with additional styling benefits.
when would I use both?
Use the molecular repair service pre and post-salon service to reverse hair damage in 4 minutes. You can layer the oil on top of the mask after the 4-minute processing time for additional frizz-reducing, styling, and heat-protecting properties.
shopping with us has its perks

exclusive tools

Get access to monthly live training, professional education, and business guides.

free shipping on $125+ orders

Shop K18 at professional wholesale pricing (no order minimums here).

real support

We have K18 experts on standby to answer allll your product and order questions.

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.

reviews

average rating 4.8 out of 5
Based on 265 reviews
  • 5 Stars
    228 Reviews
  • 4 Stars
    24 Reviews
  • 3 Stars
    7 Reviews
  • 2 Stars
    4 Reviews
  • 1 Star
    2 Reviews
95% of reviewers would recommend this product to a friend
Customer photos and videos
265 Reviews
Reviewed by Kath
Verified Reviewer
I recommend this product
Age
18 - 24
Hair Concern
  • Heat damage
  • Frizz
Hair Type
  • Curly/Coily
My Results
  • Less Frizz
  • Stronger Hair
  • Visible Difference
  • Less Breakage
  • Defined Curl/Wave Pattern
Rated 5 out of 5
Review posted

Changed my life (not even being dramatic)

I got this after loving the hair mask, I have curly hair but it’s been damaged by heat for so many years (especially as a teen) and i could never imagine wearing my hair natural because it just looked bad like frizzy, curls were not good. I’ve tried so many shampoos and creams for curly hair but this oil takes the frizz to zero and my curls look decent - I don’t know what it did compared to others on the market but i can finally feel comfortable enough to wear my natural hair. AND IT MAKES IT SO SOFT!

Loading...
Was this helpful?

K18Hair PRO

Thank you for your review!

Reviewed by Kelly W.
Verified Buyer
I recommend this product
Age
45 - 54
Client Hair Concerns
  • Heat Damage
  • Split Ends
  • Dryness
  • Oily hair/scalp
  • Fragile/Brittle Hair
Client Hair Types
  • Thick/Coarse
  • Medium Density
  • Curly/Coily
  • Grey Hair
  • Straight/Wavy
Client Results
  • Cleaner, fresher hair
  • Visible Difference
  • Stronger hair
  • Shinier Hair
  • Smoother Hair
Rated 5 out of 5
Review posted

Hair Oil

The oil has a pleasant smell , it’s lightweight, the shine is nice however I’d love to see it as a spray !?

Loading...
Was this helpful?

K18Hair PRO

Thank you for your review!

Reviewed by Jennifer H.
Verified Buyer
mini molecular repair hair oil
Reviewing
mini molecular repair hair oil
I recommend this product
Age
45 - 54
Hair Concern
  • Fragile/brittle hair
  • Chemical damage
  • Dryness
Hair Type
  • Fine/Thin
My Results
  • Less Frizz
  • Shinier Hair
Rated 4 out of 5
Review posted

Great for fly aways

This product is a bit too heavy for my fine thin hair for every day use. I like to use it to treat my dry ends and smooth away fly always when I wear my hair up.

Loading...
Was this helpful?

K18Hair PRO

Great product for the flyaways. Thank you for Jennifer!

Reviewed by Karen Bonavita G.
Verified Buyer
I recommend this product
Age
65+
Hair Concern
  • Dryness
Hair Type
  • Thick/Coarse
My Results
  • Smoother Hair
  • Soft Touchable Hair
  • Visible Difference
  • Less Frizz
  • Shinier Hair
Rated 5 out of 5
Review posted

I’m amazed after only using 2x

Thus far, I’m extremely pleased. I’ll be 69 April 30 and take care of my hair, though I do get it colored every 2 months or so. I never ever blow dry my hair. I only wash it every 6 days. But being older, my hair is definitely not as healthy as when younger. This product is already making a difference. I leave it in - 1 pump - but do lightly comb it through. Then my hair dries on its own. I’m weird - have a traveling sponge roller that I place in sections of my hair if I need a curl.

It seems softer and is laying better. I usually don’t leave such a quick review, but I can already tell 😄

Loading...
Was this helpful?

K18Hair PRO

Thank you Karen! We appreciate your review!

Reviewed by Fabiola N.
Verified Buyer
mini molecular repair hair oil
Reviewing
mini molecular repair hair oil
I recommend this product
Age
35 - 44
Hair Concern
  • Heat damage
  • Frizz
  • Split-Ends
  • Dryness
Hair Type
  • Medium Density
  • Straight/Wavy
My Results
  • Visible Difference
  • Smoother Hair
  • Shinier Hair
  • Less Frizz
Rated 5 out of 5
Review posted

Lightweight & Powerful

I normally don’t use hair oils as my hair gets naturally oily before I have to wash it in a few days, but I wanted to try this out on the ends of my hair and for flyaways. Its texture is really lightweight and smells great! I only used two drops rubbed in my hands and passed it along my ends before flat ironing and my hair looks and feels healthier. I then ran my fingers through my hair with the rest of the product to get rid of flyaways. I loved the end result! I will officially be adding this hair oil to my routine.

Loading...
Was this helpful?

K18Hair PRO

We appreciate your review! Thank you Fabiola!

Pro Distribution Partners

Paramount Beauty Supply
USA
Salon Services Pro
USA
Salon Service Group
USA
Salonwax Pro
USA
Premier Beauty Supply
USA
Launching Soon
Ozdare - Australia
AU
 
Launching Soon
American Crew Ltd. - New Zealand
NZ
 
Launching Soon
PlayGround - Hong Kong
HK
 
Launching Soon
Session Map - Sweden
SE
 
Launching Soon
Cyprus
CY
 
Launching Soon
Belgium
BE
 
Coming Early 2021
Canada
CA
 
Coming Early 2021
Czech Republic
CZ
 
Coming Early 2021
Finland
FI
 
Coming Early 2021
France
FR
 
Coming Early 2021
Germany
DE
 
Coming Early 2021
Ireland
IR
 
Coming Early 2021
Italy
IT
 
Coming Early 2021
Netherlands
NL
 
Coming Early 2021
Norway
NO
 
Coming Early 2021
Singapore
SG
 
Coming Early 2021
Taiwan
TW
 
Coming Early 2021
UK
UK
 
Coming Early 2021
thank you for visiting!

You are now being redirected to an official partner website for this region where you can shop K18 Hair.

Changed your mind? Go back.

00:00
Blackfire Tracking
subscribe + save 15%
healthy hair on your schedule
Pick your K18 + how often you want to replen.
We’ll send you a heads up before every delivery.
You’re in charge. Change the way you pay, skip a shipment, or cancel anytime.