StoreDeal.ai store
Shop
  • Deals
  • Deal checker
  • Black Friday
  • Buying guides
  • Brands
  • Stores
Travel
  • Flight deals
  • Hotel deals
Company
  • Research
  • Press
  • Use in AI assistants
  • Contact
  • deal.ai apps
Black Friday 2026
  • Walmart
  • Best Buy
  • Target
  • TVs
  • Laptops
  • Headphones
  • Apple
  • Gaming
  • Vacuums
  • Kitchen
  • Toys
  • Smartwatches
  • Tablets
  • Furniture
  • Mattresses
© Deal.ai Inc.·2222 Ponce de Leon Blvd, Miami, FL 33134·support@deal.ai
TermsPrivacy
Deal.ai › K18
K18
K18 BIOMETIC HAIRSCIENCE

K18 BIOMETIC HAIRSCIENCE

Best price now

$12.00at Goodbye InventoryChecked Nov 12

Compared across 2 stores. Prices are checked against each store and labelled with when.

Visit Goodbye Inventory
K18 discount codes →

Ask our agent about this product

It checks today's price at every store, compares the alternatives and answers in about a minute.

Enter to send, Shift+Enter for a new line

Price facts

  • Last seen at $12.00 at Goodbye Inventory on Nov 12.
  • Checked at 2 stores.

Our take on the K18 BIOMETIC HAIRSCIENCE

K18 Biomimetic Hairscience is a leave-in molecular repair treatment for damaged hair. Its selling point is the peptide K18Peptide, which the brand says reconnects broken keratin chains inside the hair, so it works on damage rather than coating the surface. It suits people with bleached, colored or heat-styled hair who want repair without a rinse-out mask. Against bond builders like Olaplex No.3, it is a leave-in you use in small amounts and do not wash out, and it is known for being costly per ounce and for a texture some find heavy.

Best forBleached or color-treated hairHeat and styling damageFine hair needing light repairSalon-style repair at home
Pros
  • Leave-in, no rinse step
  • Works on internal bond damage
  • Small amount per use
  • Popular with colorists
Cons
  • High cost per ounce
  • Thick texture can weigh hair down
  • Not a conditioner; no slip
  • Results build over repeated use

K18 BIOMETIC HAIRSCIENCE prices at every store

  • Goodbye InventoryNew

    In stockReturn policy

    $12.00Checked Nov 12
    Visit Goodbye Inventory
  • AmazonNew

    Availability unknown

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

    $29.00Checked Nov 12
    Visit Amazon

Store links may earn us a commission.

K18 BIOMETIC HAIRSCIENCE price history

Lowest price we've seen: $29.00 on Nov 13 at Amazon. Tracked across 1 store since Nov 13.

What reviewers say

Reviewers with damaged, bleached hair often report softer, stronger-feeling hair after several uses. Many complain about the price and about the thick texture, and some say it does little for hair that is not chemically damaged.

What people mention
  • Damage repairPraisedUsers say bleached and heat-damaged hair feels stronger and breaks less with regular use.
  • TextureMixedSome find it thick and easy to over-apply, leaving hair stiff or weighed down.
  • ValueCriticisedReviewers often call it expensive for the amount you get, even though a small dose is enough.
  • ConditioningCriticisedIt does not detangle or add slip like a conditioner, so some pair it with one.

About the K18 BIOMETIC HAIRSCIENCE

K18 BIOMETIC HAIRSCIENCE is a professional hair care treatment designed to strengthen and restore hair health. It uses biomimetic science formulations for targeted hair repair and maintenance.

The bottle holds 1 fl oz.

Brand
K18
Type
Hair care treatment
Size
1 fl oz

Questions and answers

How do you use K18?
Apply a small amount to damp, towel-dried hair and leave it in. Do not rinse it out. The brand says to use it for the first several washes, then as needed.
Is it a conditioner?
No. It is a leave-in repair treatment, not a conditioner, and it gives little detangling slip. Most users still use conditioner or a leave-in after it.
Does it work on undamaged hair?
It targets broken keratin chains, so it does most for bleached, colored or heat-damaged hair. On healthy hair, many users notice little difference.
Can you use it with Olaplex or other bond builders?
Users do combine it with bond builders, but space them out. Using several strong repair treatments at once can make hair stiff.
How long does one bottle last?
A small amount covers the hair, so a bottle lasts through many washes for most people. Those with long or thick hair use it faster.
Where is the K18 BIOMETIC HAIRSCIENCE cheapest?
At Goodbye Inventory, for $12.00, as of our latest check.
Where can I buy the K18 BIOMETIC HAIRSCIENCE?
2 stores we checked sell it, including Goodbye Inventory, Amazon.

Shoppers also compared

  • K
    K18 Repair Mask
    K18 Repair Mask
  • K
    K18 molecular repair hair oil
    K18 molecular repair hair oil
  • K
    K18 AirWash Dry Shampoo
    K18 AirWash Dry Shampoo
  • K
    K18 Leave-In Molecular Hair Mask
    K18 Leave-In Molecular Hair Mask
  • K
    K18 Peptide Prep Detox Shampoo
    K18 Peptide Prep Detox Shampoo
  • K
    K18 damage shield pH protective shampoo
    K18 damage shield pH protective shampoo
  • K
    K18 Leave-In Molecular Repair Hair Mask
    K18 Leave-In Molecular Repair Hair Mask
  • K
    K18 astrolift reparative volume spray
    K18 astrolift reparative volume spray

More from K18

  • K
    K18 Biomimetic Hairscience
    K18 Biomimetic Hairscience
  • K
    K18 Molecular Repair Hair Mask 50ml
    K18 Molecular Repair Hair Mask 50ml
  • K
    K18 Pro Hair Repair Mini Kit
    K18 Pro Hair Repair Mini Kit
  • K
    K18 Pro - Leave-in Molecular Repair Hair Mask - 15ml
    K18 Pro - Leave-in Molecular Repair Hair Mask - 15ml
  • K
    K18 Biomimetic Hairscience - Professional Molecular Repair Hair Mist
    K18 Biomimetic Hairscience - Professional Molecular Repair Hair Mist
  • M
    Masque sans rinçage à réparation moléculaire K18 - 50ml
Masque sans rinçage à réparation moléculaire K18 - 50ml
  • K
    K18 Biomimetic Hairscience Molecular Repair Hair Mist 5 oz
    K18 Biomimetic Hairscience Molecular Repair Hair Mist 5 oz
  • K
    K18 Mascarilla de Reparación Molecular
    K18 Mascarilla de Reparación Molecular
  • All K18 deals and products →

    More hair treatments

    • K
      K18 Peptide Prep Pro Chelating Hair Complex
      K18 Peptide Prep Pro Chelating Hair Complex
    • O
      Olaplex No.2 Bond Perfector
      Olaplex No.2 Bond Perfector
    • O
      Olaplex Hair Perfector No. 3 Repairing Treatment
      Olaplex Hair Perfector No. 3 Repairing Treatment
    • O
      Olaplex No. 6 Bond Smoother Leave In Hair Treatment
      Olaplex No. 6 Bond Smoother Leave In Hair Treatment
    • O
      Olaplex No. 3 Hair Perfector
      Olaplex No. 3 Hair Perfector
    • S
      Schwarzkopf Fibre Clinix Tribond Treatment
      Schwarzkopf Fibre Clinix Tribond Treatment
    • V
      Volumizing Nourishing Hair Treatment
      Volumizing Nourishing Hair Treatment
    • O
      Olaplex No.3 Plus Complete Repair Treatment
      Olaplex No.3 Plus Complete Repair Treatment