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Deal.ai › K18 › Styling Products
K18
K18 Hair Molecular Repair Hair Oil

K18 Hair Molecular Repair Hair Oil

4.3(13 ratings)

Best price now

$27.00at AmazonChecked 1 h ago

58% under what the other stores charge

Compared across 19 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission. As an Amazon Associate, Deal.ai earns from qualifying purchases.

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K18 discount codes →

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Price facts

  • Lowest price today: $27.00 at Amazon (checked Nov 12, 2026).
  • Checked at 19 stores.

Our take on the K18 Hair Molecular Repair Hair Oil

K18 Molecular Repair Hair Oil is a weightless, silicone-free finishing oil built around the brand's K18 peptide technology, which it says works at two levels of the hair fiber to repair damage and smooth frizz. It adds shine and softness and includes heat protection, so it can go on damp hair before styling or on dry hair to finish. It suits damaged, dry and color-treated hair that reacts badly to heavy silicone oils. Compared with typical argan or silicone serums, it is lighter and aimed at repair rather than coating, but the 1 oz bottle is small and the pipette takes some getting used to.

Best forDamaged or over-processed hairFine hair that heavy oils weigh downHeat styling and blow-dry routinesFrizz control on dry, finished hair
Pros
  • Silicone-free and weightless on fine hair
  • Adds shine and softness without a greasy film
  • Includes heat protection for styling
  • Works on damp or dry hair
  • Pairs with the K18 leave-in mask routine
Cons
  • Small 1 oz bottle goes fast with regular use
  • Pipette dispenser can be fiddly
  • Scent is noticeable and not for everyone
  • Results build over time rather than instantly

K18 Hair Molecular Repair Hair Oil prices at every store

  • Kohl'sNew

    In stock

    $27.00+ $8.95 shippingChecked 1 h ago
    Visit Kohl's
  • WalmartNew

    In stockSold by Beauty GuaranteeReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.

    $46.37Free shippingChecked 1 h ago
    Visit Walmart
  • TargetNew

    In stock

    $57.99Free shippingChecked 1 h ago
    Visit Target
  • Beauty Plus SalonNew

    In stock

    $65.00Free shippingChecked 1 h ago
    Visit Beauty Plus Salon
  • K18 HairNew

    In stock

    $65.00Checked 1 h ago
    Visit K18 Hair
  • SephoraNew

    In stock

    $65.00Free shippingChecked 1 h ago
    Visit Sephora
  • K18 HairNew

    In stock

    $65.00Free shippingChecked 1 h ago
    Visit K18 Hair
  • Niche BeautyNew

    In stock

    $88.00Checked 1 h ago
    Visit Niche Beauty
  • mcgrocer.comNew

    In stock

    $156.27Checked 1 h ago
    Visit mcgrocer.com
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $27.00Checked 1 h ago
    Visit Amazon
  • The StudioNew

    Availability unknown

    $27.00Checked 1 h ago
    Visit The Studio
  • FragranceNet.comNew

    Availability unknown

    $44.99Checked 1 h ago
    Visit FragranceNet.com
  • WalmartNew

    Availability unknownSold by Beauty Guarantee

    $46.37Checked 1 h ago
    Visit Walmart
  • zitomer.comNew

    Availability unknown

    $65.00Checked 1 h ago
    Visit zitomer.com
  • Salon ValeriaNew

    Availability unknown

    $65.00Checked 1 h ago
    Visit Salon Valeria
  • ManeprintNew

    Availability unknown

    $65.00Checked 1 h ago
    Visit Maneprint
  • The Warehouse SalonNew

    Availability unknown

    $65.00Checked 1 h ago
    Visit The Warehouse Salon
  • Moda SalonNew

    Availability unknownShips from Canada · duties may apply

    $74.00Checked 1 h ago
    Visit Moda Salon
  • HarrodsNew

    Availability unknownShips from abroad · duties may apply

    $82.00Checked 1 h ago
    Visit Harrods

Store links may earn us a commission. Some prices via Klarna.

K18 Hair Molecular Repair Hair Oil price history

Lowest price we've seen: $27.00 on Nov 13 at Kohl's. Tracked across 18 stores since Nov 13.

What reviewers say

  • 4.3 / 513 ratings

Rated 4.3 out of 5 from 13 ratings. Buyers praise the light feel, shine and frizz control, while some find the bottle small for the routine and the scent strong.

What people mention
  • WeightPraisedBuyers say it absorbs without leaving hair greasy or weighed down, even on fine hair.
  • ShinePraisedReviewers report a noticeable gloss and softer feel after use.
  • FrizzPraisedUsers say it smooths flyaways and controls frizz on finished styles.
  • ScentMixedSome find the fragrance pleasant, others say it is stronger than expected.
  • Bottle sizeCriticisedSeveral note the 1 oz bottle runs out quickly with regular use.
  • DispenserMixedThe pipette is seen as precise by some and easy to over-pour by others.

About the K18 Hair Molecular Repair Hair Oil

K18 Hair Molecular Repair Hair Oil is a lightweight, biotech-engineered hair oil. It strengthens hair, repairs damage, and reduces frizz at two levels of the hair fiber. It also improves shine and provides heat protection.

The formula is silicon-free, paraben-free and sulfate-free. It comes in a 1 oz bottle with a pipette.

Size
1 oz (1.0 fl oz)
Packaging
Travel size bottle with pipette
Hair type
Damaged, normal and dry hair
Formula
Silicon-free, paraben-free, sulfate-free
Benefits
Anti-frizz, nourishing, moisturizing, repairing, smoothing, strengthening, softening, shine
Heat protection
Yes
Scent
Scented

Specifications

size
1 ozSource
Content
Silicon-Free, Paraben-Free, Sulfate-FreeSource
Packaging
Travel Size, Bottle, PipetteSource
Hair Type
Damaged Hair, Normal Hair, Dry HairSource
Volume (fl oz)

Questions and answers

How do I use K18 hair oil?
Apply a few drops to damp hair before styling for heat protection, or to dry hair to smooth frizz and add shine. Start with one drop and add more as needed.
Is it silicone-free?
Yes. It is formulated without silicones, parabens or sulfates, so it does not coat the hair the way silicone serums do.
Does it replace the K18 leave-in mask?
No. The oil is a finishing and styling step; the mask is the treatment. They are designed to be used together.
Can I use it on fine or oily hair?
Yes, in small amounts. Its weightless formula suits fine hair, but use sparingly near the roots if your scalp gets oily.
Does it protect against heat styling?
It includes heat protection, so it can be applied before blow-drying or flat-ironing. It is not a substitute for keeping tools at a sensible temperature.
Is it safe for color-treated hair?
Yes. It is sulfate-free and aimed at damaged and dry hair, including color-treated hair.
Where is the K18 Hair Molecular Repair Hair Oil cheapest?
At Amazon, for $27.00, 58% under what the other stores charge, as of our latest check.
What do buyers say about the K18 Hair Molecular Repair Hair Oil?
Rated 4.3 out of 5 from 13 ratings.
Where can I buy the K18 Hair Molecular Repair Hair Oil?
17 stores we checked sell it, including Beauty Plus Salon, K18 Hair, Niche Beauty, Walmart, Amazon.

Stores we've priced the K18 Hair Molecular Repair Hair Oil at

  • Beauty Plus Salon deals and prices
  • FragranceNet.com deals and prices
  • Kohl's deals and prices
  • Sephora deals and prices
  • Target deals and prices
1.0Source
Gender
FemaleSource
  • Walmart deals and prices
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