Name: K18 Leave-in Molecular Repair Hair Mask
Brand: K18
SKU: k18-leave-in-molecular-repair-hair-mask-beautytap
Rating: 4.5 (326 reviews)

This at-home leave-in treatment powered by patented K18PeptideTM is clinically proven to reverse hair damage from bleach + color, chemical services, and heat to renew strength, softness, smoothness, and bounce.

3b - Bouncy ringlets

2a - Loose, stretched S-waves

2c - Distinct S-waves with some spiral curls

1b - Straight with more volume

1a - Stick straight

3a - Big, loose spiral curls

0-No hair

1c - Straight with body wave and a couple of visible S-waves, usually the neck or temples

2b - Shorter, more distinct S-waves

3c - Tight corkscrew curls

4a - Tightly coiled S-curls

4b - Tightly coiled, Z pattern curls

4c - Mostly Z-patterned, tightly kinked and less defined curls

This is a must have in my collection when it comes to hair care for just a spa day for my hair but also for damaged hair. I have am 20 years old naturally with fine hair and when I bleach my hair and do a treatment this is my holy grail go to in the process this keeps me feeling confident my hair will be ok after the process. It isn't thick or heavy at all as much as I wish this product was more easily accessible it is well worth the wait of ordering it and the extra price compared to something in the drugstore. This product is incomparable to any product I have used before when it comes to preventing damage and helping hair look togeyejr and less fuzzy and wild. I would recommend this to anyone that has color treated hair damaged hair or naturally dry frizzy fuzzy hair.

Makeup Artist (Freelance)

Other Specialized Beauty Professional

I am a professional hair model who has worked with both drugstore and salon level products. While I liked this product, I didn’t LOVE it or notice much difference compared to my other masks and restorative products. This formula felt like any regular leave-in conditioner and didn’t offer any additional performance benefits, which means it's just an addition to your existing hair routine.&nbsp;Also, I wasn't a fan of the scent and wish it had a more luxury fragrance profile like other salon products.I used the product one pump at a time on wet hair for a total of 3 pumps of product, and then followed with my typical hair care routine using TGIN or Camille Rose. I noticed how soft the product left my hands, but I didn’t notice much improvement of softness or bounce of my hair.&nbsp;The Leave-in Molecular Repair Hair Mask is a vegan, color-safe, and cruelty-free formula meant to restore hair health with the patented K18Peptide™, a clinically proven ingredient meant to reverse damage in just 4 minutes. The product claims to heal chemical damage from bleach, color, and heat, as well as restore strength and softness. The formula is a steep price ($75) for only 50mL and I don’t feel that the results were worth the price. There are many other drugstore and salon products that restore and style the hair, and offer much more quantity for a cheaper price.&nbsp;

Hair Experts

Beauty Retail Expert

Beauty Content Creator

Who doesn’t love leave-in conditioners?! Especially the ones that really hydrate and repair your hair! As a certified make up artist in the beauty industry for about seven years now, I enjoy learning and testing all sorts of different types of products to be able to share my experience and knowledge. The K18 Biomimetic Hairscience molecular repair hair mask has already done wonders on my damaged hair. I am very picky on the products that I put in my hair due to all the previous damage, which is why I have to say that this product is one I can swear by. When using this product, I do not condition while in the shower: I only shampoo and then towel dry my hair with my microfiber towel. Afterwards, I place about two pumps in my palm and work from bottom up. I have seen my curls look healthier and more defined since using this product, which is always an A+ for us curly-haired ladies!

Product Expert Reviews