molecular repair hair mask
molecular repair hair mask
4.96 / 5.0
(82) 82 total reviews
4-minute leave-in treatment to reverse hair damage
🔬 Repairs damage at the molecular level
⏱️ Works in just 4 minutes
💆 Leaves hair smooth, shiny, and strong
🌿 Clean, vegan, and cruelty-free formula
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more to know
K18PEPTIDE™ is a biotech-developed peptide that mimics hair's structure to reverse damage by reconnecting polypeptide chains and disulfide bonds broken during bleaching, color and chemical services + heat*.
pH-optimized (5.0-6.0) to help minimize cuticle swelling + put hair proteins in their most resilient state
Cream format enables easy, lightweight application across all hair types, with detangling and softening benefits
Vegan, color-safe, cruelty-free
key benefits
Takes damage repair further – reconnects both polypeptide chains (and as a result, also reconnects disulfide bonds) for strength along the length + width of the hair - offering comprehensive, lasting damage repair
Restores hair from even extreme damage - by working at the innermost layer of the hair, core strength and elasticity are renewed for strong, smooth, bouncy hair
Delivers immediate and lasting results – hair is repaired from the first use and lasts past your next wash, for ongoing reparative benefits
Simplified repair - convenient, leave-in formula works in just 4 minutes, with no extra rinse required
Works on all hair types – because K18PEPTIDE™ works on a molecular level (where all hair is the same), this product is effective on all hair types
how to use
Shampoo, do not condition. Towel-dry thoroughly
Apply 1-3 pumps of K18 leave-in molecular repair hair mask based on your length and density, starting at the ends and working up towards the roots
Let sit for 4 minutes. Do not rinse out
Comb, add product + style as usual. Use for 4-6 washes post-salon service, then as needed
dos and don"ts
DO clarify before K18 if you’re a heavy product user (demineralize for mineral + metal buildup)
DO apply on clean, damp hair
DO wait the full 4 minutes before combing or styling
DO add whatever styling products you love after the 4 minutes
DO use for 4-6 shampoos consecutively for progressive results
DON'T use conditioner before applying K18 Mask (you can apply after the 4 min but most find they don’t need it)
DON'T overdo it—less is more
DON'T rinse it out
description
A leave-in treatment mask that works on the molecular level to reverse hair damage in just 4 minutes. The K18PEPTIDE™ is clinically proven to repair damage from bleach + color, chemical services and heat* – with immediate and lasting results to restore strength, softness, smoothness and bounce to hair.
got questions?
how does the k18 mask work?
The K18 mask works as a treatment to reverse damage in 4 minutes. It’s powered by our seamlessly fit in and reconnect broken polypeptide chains at the molecular level. As a result, disulfide bonds are also reconnected for reinforced strength along the length + width of hair—offering comprehensive, lasting, and progressive repair.
why skip conditioner?
Conditioner leaves a film that blocks our peptide from penetrating effectively. Once the 4-minute wait time is up, feel free to use a conditioner, a leave-in, or any type of product.
when should i expect to see results?
Most see results after 2-3 uses. The more damaged the hair, the more dramatic the results so it may vary depending on your hair type and level of damage.

healthier hair with every use
Reverse damage in 4 minutes with our breakthrough K18 molecular repair technology.
the K18 difference
Feel what’s possible with fewer steps, less waste + less time.
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efficacy
patented K18PEPTIDE™ powers deeper + lasting repair.
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simplicity
fewer steps for a streamlined routine.
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speed
results in one 4-minute use.
how molecular repair compares

I am amazed...completely!
using K18, soft and shinning. It looks so healthy and vibrant!
I like it a lot it feels very soft
K18 simply put is by far the best product to restore healthy hair.
Left my hair so shiny and soft!!! It helped with the snarls and everything!!!