.atc-faceout-container.sp_atc {         position: absolute;         bottom: 0;         right: 0;         width: auto;     }     form#spAddToCart {         margin-bottom: 0;     }     .ax-replace.stepper_wrapper {         padding: 6px;     }          .ax-atc.sp-ax-atc {         position: absolute;         right: 6px;         bottom: 6px;     }     .sp_desktop_quantity_stepper_container {         position: absolute;         bottom: 6px;         right: 6px;         z-index: 10;     }     .sp_atc_and_image {         position: relative;     }          #widget-spotbutton {         height: 32px !important;         width: 32px !important;         min-width: 32px !important;     }                                                           K18 Leave-In Molecular Repair Hair Mask, Patented, Lasting Repair For Dry, Frizzy, ...
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From what we've gathered, the K18 Leave-In Molecular Hair Mask works pretty uniquely by focusing on fixing your hair's internal structure, not just glossing over the surface. It's designed specifically for damage from things like bleaching and heat styling.

Basically, the manufacturer claims it uses this neat K18PEPTIDE™ technology to repair the inner workings of your hair.

If you're wondering how quickly you'll see results, it's a bit of a mixed bag. You might start noticing some improvements after only a few uses, but to really see the bigger changes, you have to be patient and consistent.

Our research suggests using the mask with every wash for about the first four to six times to see optimal results.

Applying the mask is pretty straightforward: skip your usual conditioner, put the mask on towel-dried hair, and just let it sit for four minutes. This helps the mask do its magic and really absorb into your hair.

Some folks do mention that while the results are great, the bottle can seem a bit sparse compared to what they expected.

But if you're after something that promises to strengthen and revitalize your hair from the inside out, it could be worth a shot.

Lowest at Amazon
$75.00 at Amazon
Lowest at any Popular Retailer
$47.22 at groupon.com
How we researched this

Where this comes from: This answer is based on ShopSavvy's product database, real-time pricing from 12 retailers, and a look at hundreds of user reviews to give you a well-rounded picture.

Where to Buy

Prices last updated: August 25th 2026 8:11 am

Considering the K18 Leave-In Hair Mask?

Here's our "TLDR" Review

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More Answers

If you're still curious about the K18 Leave-In Hair Mask, here are some other answers you might find interesting:

💇‍♀️

Is K18 hair mask worth the high price?

Published: February 1st, 2024
Last Updated: June 7th, 2024
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💇‍♀️

Does K18 work on all hair types including curly and color-treated hair?

Published: February 1st, 2024
Last Updated: July 4th, 2024
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💆‍♀️

How much K18 hair mask should I use per application?

Published: February 1st, 2024
Last Updated: June 26th, 2024
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