K18 Professional Leave-In Molecular Repair Hair Mask

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Size: 5oz
Price:
$149 $162
Stock:
In stock
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Description

K18 Leave-In Molecular Repair Hair Mask

4-Minute Molecular Repair Treatment for Bleach, Colour, Chemical & Heat Damage

K18 Leave-In Molecular Repair Hair Mask is a lightweight leave-in treatment designed for hair damaged by bleaching, colouring, chemical processing and heat styling. Powered by patented K18PEPTIDE™ technology, it works within the hair fibre to help reconnect damaged keratin chains and improve strength, elasticity and resilience.

Unlike a traditional rinse-out conditioning mask, K18 is applied after shampooing and left in the hair. Allow it to work for 4 minutes before adding additional styling products.

Best For

  • Bleached or lightened hair
  • Colour-treated hair with structural damage
  • Chemically processed hair
  • Heat-damaged hair
  • Hair experiencing breakage or reduced elasticity
  • Hair weakened by repeated salon services
  • All hair types and textures needing targeted damage repair

Why You'll Love It

  • Powered by patented K18PEPTIDE™ technology
  • Targets damage within the hair fibre
  • Helps restore strength and elasticity
  • Helps reduce breakage
  • Works in just 4 minutes
  • Lightweight leave-in formula
  • Suitable for all hair types and textures
  • Fits into both K18 and mixed-brand repair routines

K18 or a Traditional Hair Mask?

Choose K18 when structural damage from bleach, colour, chemical services or repeated heat styling is the primary concern.

Choose Kevin Murphy YOUNG.AGAIN.MASQUE when dryness, brittleness, dullness and ageing-hair concerns are more important than significant structural damage.

Choose amika Hydro Rush Intense Moisture Mask when intensive hydration is the main requirement, particularly for dry, coarse, textured, wavy, curly or coily hair.

Choose OLAPLEX Rich Hydration Mask when dry medium-to-coarse hair needs richer moisture, smoothing and frizz control.

The right treatment depends on whether your hair primarily needs repair, hydration or restorative conditioning.

Build Your K18 Repair Routine

  1. Clarify When Needed: Use K18 PEPTIDE PREP Detox Shampoo periodically when product, oil or mineral buildup needs to be removed.
  2. Cleanse: Shampoo the hair. Follow the K18 treatment directions rather than automatically applying a conventional conditioner before the mask.
  3. Repair: Towel-dry thoroughly and apply K18 Leave-In Molecular Repair Hair Mask.
  4. Wait: Leave K18 in for 4 minutes before adding other products.
  5. Protect: Add K18 HeatBounce when dedicated heat protection is needed before blow-drying or hot tools.
  6. Finish: Add K18 Molecular Repair Hair Oil when additional frizz control, shine and finishing protection are desired.

Choose Your K18 Routine

Core Damage Repair:
Appropriate shampoo + K18 Leave-In Molecular Repair Hair Mask

Damage + Buildup:
K18 PEPTIDE PREP Detox Shampoo + K18 Leave-In Molecular Repair Hair Mask

Damage + Heat Styling:
K18 Leave-In Molecular Repair Hair Mask + K18 HeatBounce

Complete Repair + Finish:
K18 treatment routine + K18 Molecular Repair Hair Oil

Can I Use K18 With Kevin Murphy, OLAPLEX or amika?

Yes. Your routine does not need to come entirely from one brand.

You can use K18 as your targeted repair treatment while choosing your regular shampoo, styling and finishing products from Kevin Murphy, OLAPLEX, amika, Eleven Australia, Neuma or another professional brand according to your hair's other needs.

The important part is following the K18 application protocol correctly and avoiding unnecessary product layering before the treatment has completed its 4-minute processing period.

How to Use

Shampoo the hair and do not condition before application. Towel-dry thoroughly. Apply 1–3 pumps depending on hair length and density and distribute evenly. Leave in for 4 minutes. Do not rinse. After the 4-minute period, add additional styling or finishing products as needed.

Complete Your K18 Routine

Explore complementary K18 essentials: K18 PEPTIDE PREP™ Detox Shampoo Canada and K18 Molecular Repair Hair Oil Canada 30ml.

Shop the K18 Routine: Recommended Next Steps

Choose only the steps that match your hair goals; not every routine needs every product.

Explore Products for Your Hair Goals

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