Description
Full Size – 50mL
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.
20+ billion TikTok views 🔥
*Disclaimers
ingredients
Water (Aqua) (Eau), Alcohol Denat., Propylene Glycol, Cetearyl Alcohol, Dicaprylyl Ether, Cetyl Esters, Behentrimonium Chloride, Polysorbate 20, sh- Oligopeptide-78, Hydrolyzed Wheat Protein, Hydrolyzed Wheat Starch, Isopropyl Alcohol, Tocopherol, Phenoxyethanol, Potassium Sorbate, Citric Acid, Fragrance (Parfum), Geraniol, Linalool, Hexyl Cinnamal, Benzyl Alcohol, Amyl Salicylate, Benzaldehyde.
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.
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.
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.
how to use
1. Shampoo, do not condition. Towel-dry thoroughly.
2. 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.
3. Let sit for 4 minutes. Do not rinse out.
4. Comb, add product + style as usual. Use for 4-6 washes post-salon service, then as needed.
how does the k18 mask work?
The K18 mask works as a treatment to reverse damage in 4 minutes. It’s powered by our biomimetic K18PEPTIDE™ to 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.
what is the k18peptide™?
K18PEPTIDE™ is a biotech-developed peptide that mimics hair’s structure to reverse damage by reconnecting polypeptide chains and disulfide bonds broken during damage from bleach + color, chemical services, and heat*
*Disclaimers
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.
i noticed there’s alcohol in the formula, isn’t that bad for you?
We like to keep our formulas minimal, only using the exact amount of ingredients needed to get the peptide where it needs to go. Here the alcohol serves as an agent to optimize the hair environment for the K18 mask to work on a deeper level. Our unique blend of 3 alcohols functions to open the hair cuticle so the K18PEPTIDE™ can penetrate the innermost layer of hair, reaching the broken polypeptide chains (keratin chains).
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.
4-minute leave-in treatment to reverse hair damage
powered by K18PEPTIDE™
Biomimetic peptide clicks into hair’s keratin structure—the source of core strength—for soft, shiny, bouncy results that won’t wash away.
how to use molecular repair mask
1. Shampoo, do not condition. Towel-dry thoroughly.
2. Apply 1-3 pumps based on your length and density, starting at the ends and working up towards the roots.
3. Let sit for 4 minutes. Do not rinse out.
4. Comb, add styling product + style as usual. Use for 4-6 washes, then as needed.
*k18hair.com/disclaimers
*Disclaimers
Jumbo Size – 100mL
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.
20+ billion TikTok views 🔥
*Disclaimers
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
1. Shampoo, do not condition. Towel-dry thoroughly.
2. 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.
3. Let sit for 4 minutes. Do not rinse out.
4. 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.
ingredients
Water (Aqua) (Eau), Alcohol Denat., Propylene Glycol, Cetearyl Alcohol, Dicaprylyl Ether, Cetyl Esters, Behentrimonium Chloride, Polysorbate 20, sh- Oligopeptide-78, Hydrolyzed Wheat Protein, Hydrolyzed Wheat Starch, Isopropyl Alcohol, Tocopherol, Phenoxyethanol, Potassium Sorbate, Citric Acid, Fragrance (Parfum), Geraniol, Linalool, Hexyl Cinnamal, Benzyl Alcohol, Amyl Salicylate, Benzaldehyde.
how does the k18 mask work?
The K18 mask works as a treatment to reverse damage in 4 minutes. It’s powered by our biomimetic K18PEPTIDE™ to 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.
what is the k18peptide™?
K18PEPTIDE™ is a biotech-developed peptide that mimics hair’s structure to reverse damage by reconnecting polypeptide chains and disulfide bonds broken during damage from bleach + color, chemical services, and heat*
*Disclaimers
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.
i noticed there’s alcohol in the formula, isn’t that bad for you?
We like to keep our formulas minimal, only using the exact amount of ingredients needed to get the peptide where it needs to go. Here the alcohol serves as an agent to optimize the hair environment for the K18 mask to work on a deeper level. Our unique blend of 3 alcohols functions to open the hair cuticle so the K18PEPTIDE™ can penetrate the innermost layer of hair, reaching the broken polypeptide chains (keratin chains).
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.
4-minute leave-in treatment to reverse hair damage – now in an exclusive jumbo size
powered by K18PEPTIDE™
Biomimetic peptide clicks into hair’s keratin structure—the source of core strength—for soft, shiny, bouncy results that won’t wash away.
how to use molecular repair mask
1. Shampoo, do not condition. Towel-dry thoroughly.
2. Apply 1-3 pumps based on your length and density, starting at the ends and working up towards the roots.
3. Let sit for 4 minutes. Do not rinse out.
4. Comb, add styling product + style as usual. Use for 4-6 washes, then as needed.
*k18hair.com/disclaimers
*Disclaimers
Mini Size – 15mL
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.
20+ billion TikTok views 🔥
*Disclaimers
ingredients
Water (Aqua) (Eau), Alcohol Denat., Propylene Glycol, Cetearyl Alcohol, Dicaprylyl Ether, Cetyl Esters, Behentrimonium Chloride, Polysorbate 20, sh- Oligopeptide-78, Hydrolyzed Wheat Protein, Hydrolyzed Wheat Starch, Isopropyl Alcohol, Tocopherol, Phenoxyethanol, Potassium Sorbate, Citric Acid, Fragrance (Parfum), Geraniol, Linalool, Hexyl Cinnamal, Benzyl Alcohol, Amyl Salicylate, Benzaldehyde.
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.
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.
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.
how to use
1. Shampoo, do not condition. Towel-dry thoroughly.
2. Apply 3-9 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.
3. Let sit for 4 minutes. Do not rinse out.
4. Comb, add product + style as usual. Use for 4-6 washes post-salon service, then as needed.
how does the k18 mask work?
The K18 mask works as a treatment to reverse damage in 4 minutes. It’s powered by our biomimetic K18PEPTIDE™ to 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.
what is the k18peptide™?
K18PEPTIDE™ is a biotech-developed peptide that mimics hair’s structure to reverse damage by reconnecting polypeptide chains and disulfide bonds broken during damage from bleach + color, chemical services, and heat*
*Disclaimers
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.
i noticed there’s alcohol in the formula, isn’t that bad for you?
We like to keep our formulas minimal, only using the exact amount of ingredients needed to get the peptide where it needs to go. Here the alcohol serves as an agent to optimize the hair environment for the K18 mask to work on a deeper level. Our unique blend of 3 alcohols functions to open the hair cuticle so the K18PEPTIDE™ can penetrate the innermost layer of hair, reaching the broken polypeptide chains (keratin chains).
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.
4-minute leave-in treatment to reverse hair damage
powered by K18PEPTIDE™
Biomimetic peptide clicks into hair’s keratin structure—the source of core strength—for soft, shiny, bouncy results that won’t wash away.
how to use molecular repair mask
1. Shampoo, do not condition. Towel-dry thoroughly.
2. Apply 1-3 pumps based on your length and density, starting at the ends and working up towards the roots.
3. Let sit for 4 minutes. Do not rinse out.
4. Comb, add styling product + style as usual. Use for 4-6 washes, then as needed.
*k18hair.com/disclaimers
*Disclaimers
Limited-Edition Scent – 50 mL
A limited-edition K18 x Future Society collab. Biology-first molecular hair repair mask scented with fragrance inspired by extinct flower DNA.
more to know
Making the impossible possible in haircare and scent with biotech.
K18’s biology-first molecular hair repair mask, powered by the patented K18PEPTIDE™, has the right size + molecular structure to repair multiple types of bonds at the molecular level. It works in just 4 minutes*—delivering immediate + lasting strength, softness, smoothness, and bounce for all hair types.
In collaboration with Future Society, this limited-edition scent is inspired by extinct flower DNA, and brought back to life with biotech. Floating Forest is a cool aquatic floral scent, rooted in an extinct rainforest tree once found only in Borneo.
key benefits
* Reverses damage in 4 minutes* to restore strength, softness, smoothness + bounce
* Immediate + progressive results*
* Limited-edition scent
how to use
**In the shower:**
– Shampoo, don‘t condition.
**Out of the shower:**
* Gently towel dry hair until damp.
* Apply one mL/one dime-sized amount of K18 Mask.
* Only add more as needed. Average use is two mL/two dime-size amounts (this is a highly concentrated formula, so you‘ll need much less than traditional masks).
* Work evenly into hair from ends to roots.
* Wait four minutes for the K18PEPTIDE™ to reach the innermost layers of hair
* Don‘t rinse out.
* Style as usual after the four minutes is up (fine to add heat protectant or styling product now).
* Use for the first four to six washes, then swap to maintenance mode and use 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.
ingredients
Water (Aqua) (Eau), Alcohol Denat., Propylene Glycol, Cetearyl Alcohol, Dicaprylyl Ether, Cetyl Esters, Behentrimonium Chloride, Polysorbate 20, sh-Oligopeptide-78, Hydrolyzed Wheat Protein, Hydrolyzed Wheat Starch, Isopropyl Alcohol, Tocopherol, Phenoxyethanol, Potassium Sorbate, Citric Acid, Fragrance (Parfum), Benzyl Alcohol, Benzyl Salicylate, Beta-Caryophyllene, Citrus Aurantium Bergamia Peel Oil, Limonene, Linalool, Linalyl Acetate, Pinene, Terpineol, Terpinolene, Tetramethyl Acetyloctahydronaphthalenes.
how does the k18 mask work?
The K18 mask works as a treatment to reverse damage in 4 minutes*. It’s powered by our biomimetic K18PEPTIDE™ to 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.
*Disclaimers
what is the k18peptide™?
K18PEPTIDE™ is our patented biotechnology that repairs hair at a molecular level across multiple types of bonds including polypeptide chains and disulfide bonds to reverse damage from bleach + color, chemical services, and heat*. Developed through biotechnology, the K18PEPTIDE™ is optimized for human biology and uniquely matches and clicks into hair’s keratin structure, reconnecting damage sites at the molecular level. K18PEPTIDE™ restores strength, softness, smoothness, and bounce for all hair types.
*Disclaimers
why do I 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.
Who is Future Society?
Future Society is a fragrance house that makes scents inspired by and created through biology. They make possible what chemistry alone cannot accomplish and believe like art, biology is a profound form of expression that has untapped potential to create what was once thought to be impossible.
Bestselling mask scented with Floating Forest biotech fragrance
got questions?
Get started here.
powered by K18PEPTIDE™
Biomimetic peptide clicks into hair’s keratin structure—the source of core strength—for soft, shiny, bouncy results that won’t wash away.
how to use molecular repair mask
1. Shampoo, do not condition. Towel-dry thoroughly.
2. Apply 1-3 pumps based on your length and density, starting at the ends and working up towards the roots.
3. Let sit for 4 minutes. Do not rinse out.
4. Comb, add styling product + style as usual. Use for 4-6 washes, then as needed.
*k18hair.com/disclaimers
*Disclaimers
