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There’s no doubt that a healthy diet, heat protection, and a silk pillowcase are the holy grails when it comes to healthy, bouncy hair—but hair masks, like the K18 Leave-In Molecular Repair Hair Mask, are MVP-worthy too.
After moving to a much drier climate, the fresh air wreaked havoc on my skin, clothes, and hair. As someone who streaks my hair twice a year and takes extensive measures to ensure hair health, I was on a mission to find a way to save my otherwise healthy hair from my new city’s static-prone, dry air.
Even after watching tons of YouTube videos reviewing hair products and asking friends and family en masse for tips on hair health, it wasn’t before I visited my local Sephora and heard praise for the K18 Leave-In Molecular Repair Hair Mask that made me wonder where this mask had been all my life.
$89 CAD/$75 USD at Sephora
Whether you’re a hair health enthusiast or have put your strands to the test, this mask’s patented peptide technology reverses damage from chemical treatments, dyeing, bleaching and heat and claims to restore your hair’s strength and bounce.
Vegan and cruelty-free, K18 Leave-In Molecular Repair Hair Mask uses patented technology to target problem areas and restore hair to its healthiest state. The patented K18 peptide is the perfect size and molecular structure to reach the deepest layers of the hair and reconnect keratin chains that contribute to your hair’s strength, smoothness and elasticity.
A bonus? The K18 Leave-In Molecular Repair Hair Mask has a gentle floral fragrance that leaves your hair smelling fresh with notes of jasmine and peony.
how to use it
With this hair mask, the treatment begins with your shower. Wash your hair as usual, but skip the conditioner and instead gently towel dry your hair after washing. K18 works best when used alone without additional masks.
Once your hair is towel dry and slightly damp, apply a pump of product and work into hair from ends to roots. K18 recommends using 1-3 pumps depending on the length and thickness of your hair. Because this formula is highly concentrated, the amount of product used can feel light compared to other hair masks.
Refrain from applying other products to your hair for at least four minutes – this is the activation time. After four minutes, you can continue with your remaining post-shower products. As already mentioned, this mask does not need to be rinsed out.
It is recommended to use the product for the first four to six weeks after any major hair treatment. You can then switch to maintenance mode with the mask if necessary.
$89 CAD/$75 USD at Sephora
My rating – and what others say
I couldn’t believe the change in my hair after the first use of this leave in mask. It was sleek with neat ends that looked like I had a professional trim and blow out. Styling was easier than usual and my hair had a soft shine.
Sephora buyers can’t get enough of this ampoule hair mask either.
“I really didn’t have high hopes for this product but gave it a try anyway. I’ve tried several other bond repair products with next to nothing, but this is a wow product. My hair is long, thick, and bleached to platinum blonde. I noticed a big difference in one application. My hair is softer, my waves came back and frizz is 75 percent less,” shared one reviewer.
“OK. I had to leave a review for this. It has totally changed the health of my hair. I have bleached my hair 5 times in the last year and this has restored it. Perfect,” adds another.
With more than 2,800 ratings and 4.3 stars, reviewers love to remind new buyers that following the directions is really important to get the full shiny, frizz-busting results.
“I have dark brown hair that I bleach every six weeks. This saved my hair and eliminated four different products. I know the negative reviews say it makes your hair feel gross, but they used way too much product,” says one shopper. “I have hair that goes four inches past my shoulder and I only use one pump on each half of my hair. I don’t apply too much to my roots and really work it in and let it set while I apply my makeup. “
“I used at least three times less product than usual. I didn’t even have to heat style my hair to keep it looking nice. I’m amazed I didn’t use that much product… four pumps for my whole head with very thick hair,” adds another. “Absolutely love this, so glad I took the plunge, worth every penny.”
As the recipient of the benefits of the K18 Leave-In Molecular Repair Mask firsthand, I couldn’t believe the results after the first use. Currently in ‘maintenance mode’ I use this product sparingly when my hair feels it needs a little extra love and am still impressed with the results. Overall, my hair feels and looks healthier than ever.
If you want great results from a single hair product, this mask will not disappoint. While it’s an expensive addition to your haircare routine, the minimal amount of product required means the bottle is likely to outlast the rest of your hair products – just make sure to follow the directions carefully for the best results.