K18 Leave-In Molecular Repair Hair Mask

BESTSELLER

$24.00

Function 50Ml 118Ml Astrolift 118Ml Airwash 150Ml

Four minutes of care. No extra rinse.

Give stressed hair a dedicated treatment step with K18 Leave-In Molecular Repair Hair Mask. Designed for hair affected by coloring, bleaching, chemical services, and heat styling, it helps restore a softer feel, smoother texture, and natural movement.

Its leave-in format fits easily into wash day: apply after shampooing, wait four minutes, then continue styling.

Softness, smoothness, and movement

Help your lengths feel more manageable while keeping the movement that makes your hair yours. The cream format makes it easy to distribute a small amount through the areas that need attention.

Why you’ll love it

We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.

We are committed to ensuring a positive shopping experience for all our customers. If for any reason you wish to return an item, we invite you to reach out to our team for assistance, and we will evaluate every return request with care and consideration.

Treatment for damaged hair

Four-minute treatment

Leave-in convenience

Versatile care

More benefits

Choice of sizes

How to use

Shampoo your hair and skip conditioner before the mask.
Towel-dry thoroughly.
Apply a small amount, starting at the ends and working upward. Adjust the quantity to your hair’s length and density.
Wait four minutes before combing or adding styling products.
Do not rinse. Continue with your styling routine.

K18 recommends using the mask for the first 4–6 consecutive washes, then as needed for maintenance. Follow the directions on your specific pack.

Details

Feature Details

Product type

Leave-in hair treatment mask

Main care goals

Strength, softness, smoothness, and elasticity

Hair types

All hair types

Application

Clean, towel-dried hair

Waiting time

4 minutes before styling

Rinsing

Not required

Format shown

Pump bottle

Care powered by K18PEPTIDE™

K18’s signature peptide technology is designed to address damage within the hair fiber and improve strength and elasticity. It brings targeted treatment to hair that feels weakened or looks stressed from repeated processing.

Here for your routine

Your experience
matters.

Feel confident about every step of your routine.

Product questions

Do I need to blow-dry my hair for the mask to work?

You can choose to air-dry. Using a hairdryer is not a required step, so your finishing routine can stay focused on the texture and style you prefer.

Why does my hair feel heavy after using it?

Using more than your hair needs can leave it weighed down or greasy. Review the quantity rather than assuming that a thicker coating will give you a better result.

Should I do anything differently if I use a lot of styling products?

K18 recommends clarifying first when heavy product buildup is present. A regular wash may not always remove that coating; choose the cleansing step according to your actual buildup rather than adding extra mask.