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Staff Choice

"This actually works; it's not cheap but I think it's a bargain for what it does. If your hair is damaged then K18 is for you. I've been using it for around 9 months and my hair strength, quality and lustre, whilst not reversed, is noticeably improved and I have less breakage. " - Tracy

K18

Leave-In Molecular Repair Hair Mask 50ml

4.8 (19)

Save 9%

$104.95

$114.95

4 payments of with

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Delivery
Click & Collect

In Stock - Free Shipping

Estimated delivery: Wed, Jun 3rd - Mon, Jun 8th

130 Days returns

Free Click and collect is available at checkout. Orders are ready within 1 hour during opening hours. Store Address: 56 Parer Rd, Airport West, VIC Australia 3042 Phone (03) 9999 5902

FREE K18 Leave-In Molecular Repair Hair Mask Mini

With your next K18 purchase over $60. Limit 1 per customer.

FREE Kevin.Murphy Hair Turban

With orders over $149+ sitewide.
Valued at $34.95.

Most Helpful Review

Why You’ll love it

Feel like you’ve rewound years of damage in a four-minute pause.

Hair feels soft, springy, and less fragile under your fingers.

Helps colour-treated strands look smoother, less frizzy, more polished.

Lightweight, leave-in formula that doesn’t weigh fine hair down.

Description

K18 Leave-In Molecular Repair Hair Mask is a leave-in treatment that restores damaged hair from within.

This lightweight cream uses advanced peptide technology to travel deep into the hair and reconnect broken keratin chains. Hair feels stronger, smoother, and less brittle, without a heavy or greasy coating.

The texture is silky and spreads easily through damp hair, absorbing quickly with no sticky residue. Once dry, hair feels soft, bouncy, and easier to style, with a natural-looking finish.

It’s ideal for hair stressed by colouring, bleaching, heat styling, or chemical treatments, and perfect before blow-drying or air-drying. With regular use, hair looks more resilient and manageable, so everyday styling feels faster, simpler, and more enjoyable.

Directions

How To Use K18 Leave-In Molecular Repair Hair Mask

Shampoo, then rinse thoroughly. Do not use conditioner.
Towel-dry hair until it is just damp, not dripping.
Start with 1–3 pumps, depending on hair length and thickness.
Apply evenly from mid-lengths to ends, one section at a time.
Comb through with fingers to distribute. Do not rinse out.
Wait 4 minutes to let it absorb and activate.
Style as usual, with or without heat.
Use after every wash for 4–6 washes, then as needed.

Ingredients

K18 Leave-In Molecular Repair Hair Mask Ingredients

Water (Aqua), Alcohol Denat., Propanediol, Myristyl Alcohol, Cetearyl Alcohol, Behentrimonium Chloride, Amodimethicone, Pentaerythrityl Tetra-di-t-butyl Hydroxyhydrocinnamate, Cetrimonium Chloride, PPG-3 Benzyl Ether Myristate, Hydrolyzed Wheat Protein, Hydrolyzed Wheat Starch, Cetyl Esters, Fragrance (Parfum), Citric Acid, Potassium Sorbate, Disodium EDTA, C11-15 Pareth-7, Laureth-9, Glycerin, Trideceth-12, Phenoxyethanol, Polyquaternium-37, Hydrolyzed Opuntia Ficus-Indica Flower Extract, Oryza Sativa (Rice) Bran Oil, Argania Spinosa Kernel Oil, Helianthus Annuus (Sunflower) Seed Oil, Rosmarinus Officinalis (Rosemary) Leaf Extract, Tocopherol, Acetic Acid, Sh-Oligopeptide-78 (K18Peptide™).

Note: Please refer to bottle for full ingredients.

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Reviews

Reviews: K18 Leave-In Molecular Repair Hair Mask

4.8 (19)

Most Helpful Review

K18 has changed my hair for the better. It’s not so brittle, and I can’t get enough of it.
Written by jasmine On 29/03/2026
1 people found this helpful

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