K18 Leave in Molecular Repair Hair Mask is a professional leave-in treatment mask that works on the molecular level to reverse hair damage in just 4 minutes. Powered by the K18PEPTIDE™, clinically proven to repair damage caused from bleach + colour, chemical services and heat* – delivering immediate and lasting results that restore strength, softness, smoothness and bounce. This formula is vegan, colour-safe, cruelty free and suitable for all hair types.

What is K18PEPTIDE™?

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*.

Key benefits:

Deeper damage repair – 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.

Immediate and lasting results – hair is repaired from the first use and lasts past your next wash, for ongoing reparative benefits.

No rinse, leave-in convenience - convenient, leave-in formula works in just 4 minutes, with no extra rinse required.

Effective on all hair types – because K18PEPTIDE™ targets on a molecular level (where all hair is the same), it works for straight, wavy, curly, coily, fine, thick, or chemically-treated hair.

What to do - and what to avoid

Do:

• Clarify before K18 if you’re a heavy product user (demineralize for mineral + metal buildup).
• Apply on clean, damp hair.
• Wait the full 4 minutes before combing or styling.
• Add whatever styling products you love after the 4 minutes.
• 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).
• Overdo it—less is more.
• Rinse it out.

How to use the K18 Hair Mask: Shampoo, do not condition. Towel-dry thoroughly. Apply 1-3 pumps depending 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.

Pro Tip: For the most visible transformation, use K18 for the first 4–6 washes in a row. Then, switch to every 3–4 washes to maintain strong, healthy hair.

K18 Leave in Molecular Repair Hair Mask is a professional leave-in treatment mask that works on the molecular level to reverse hair damage in just 4 minutes. Powered by the K18PEPTIDE™, clinically proven to repair damage caused from bleach + colour, chemical services and heat* – delivering immediate and lasting results that restore strength, softness, smoothness and bounce. This formula is vegan, colour-safe, cruelty free and suitable for all hair types.

What is K18PEPTIDE™?

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*.

Key benefits:

Deeper damage repair – 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.

Immediate and lasting results – hair is repaired from the first use and lasts past your next wash, for ongoing reparative benefits.

No rinse, leave-in convenience - convenient, leave-in formula works in just 4 minutes, with no extra rinse required.

Effective on all hair types – because K18PEPTIDE™ targets on a molecular level (where all hair is the same), it works for straight, wavy, curly, coily, fine, thick, or chemically-treated hair.

What to do - and what to avoid

Do:

• Clarify before K18 if you’re a heavy product user (demineralize for mineral + metal buildup).
• Apply on clean, damp hair.
• Wait the full 4 minutes before combing or styling.
• Add whatever styling products you love after the 4 minutes.
• 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).
• Overdo it—less is more.
• Rinse it out.

How to use the K18 Hair Mask: Shampoo, do not condition. Towel-dry thoroughly. Apply 1-3 pumps depending 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.

Pro Tip: For the most visible transformation, use K18 for the first 4–6 washes in a row. Then, switch to every 3–4 washes to maintain strong, healthy hair.

The K18 Peptide Prep Detox Shampoo is a colour-safe clarifying shampoo with skincare-inspired ingredients, and microdosed with the patented K18PEPTIDE™ to nourish hair while removing buildup for a clean, healthy hair canvas. A non stripping lather works to unclog hair follicles while banishing dirt, oils, silicones and things left behind from heavy product buildup including 99% of product buildup, 95% of sebum and a 76% copper reduction* after just 1 wash. This shampoo prepares hair for maximum K18 Molecular Repair Leave-in Treatment results. Deeply cleanses hair without being harsh on the scalp.

*results observed on bleached hair tress after 1 wash with detox shampoo

How to use: Use in place of your favourite shampoo once a week or as needed. Massage into hair and scalp to remove excess build up. Rinse thoroughly. Repeat as needed. 

The K18 Air Wash Dry Shampoo is the reinvention of dry shampoo. The future of clean, powered by biotech. AirWash™ is a non-aerosol dry shampoo powered by odourBIND™ smart-release biotechnology and delivers a high-performance clean--clinically eliminating odour and reducing oil without starchy buildup, white cast, or heavy fragrances. Keeps working for up to 3 days.** Tested on 4 day unwashed hair.

What it does:

• Absorbs oil - made with translucent microbeads to absorb oil without visible starchy buildup or white cast.
• Eliminates odours - smart-release odourBIND™ biotechnology recognises, traps and eliminates odour-causing molecules, and replaces malodors with a subtle fragrance for a clean, fresh feel for up to 3 days.**
• Supports a healthy scalp - supports scalp sebrum balance to promote scalp health between washes and minimises excess buildup.
• Leaves hair feeling and looking clean - deeply cleanses without feeling gritty or heavy buildup, for a run-your-fingers-through clean feeling.
• Lasting results - high-performance formula lasts for up to 3 days**, highly concentrated so you can use less and go longer between washes.

**Results observed in a scientific test of 30 subjects after 1 use of AirWash™ dry shampoo after 72 hours. Measurements were made by a sebumeter and expert odor grader.

***Results observed in a consumer test of 30 subjects where AirWash dry shampoo was applied once after 4 days of no washing, then tested after a further 3 days without washing.

 How to use: Use to extend styles, and refresh hair between wash days. Shake Well. Non-aerosol format may feel slightly damp but will not disturb your style. Hold the bottle 4-6 inches away from scalp for even distribution. Start with 1 spray per section, increasing up to 3 sprays per section as needed. Massage in and brush or style as usual.

The K18 Molecular Repair Hair Oil strengthens and smooths for immediate and longer-term frizz control. This biotech-engineered weightless oil works on all types of hair to strengthen, repair damage, reduce frizz at two levels of the hair fibre, and improve shine.

K18PEPTIDE™ penetrates hair at a molecular level to repair hair and reverse the damage that causes frizz. At the surface level, the silicone free formula uses natural Avocado + Sunflower Oils, Hemisqualane, and Squalane to help reinforce hair's natural moisture barrier and immediately smooth frizz and fly-aways. Improves colour vibrancy, shine, and provides heat protection for up to 232°C (450°F)

• 24 hour frizz control ^*
• 104% improvement in shine ^**
• 78% reduction in split ends ^***
• 450°F/232°C heat protection ^****
• Clinically proven to repair damaged hair

How to use:

Start with 1-3 drops and add more as needed. Apply to damp hair and leave in for strengthening benefits and frizz reduction. Use on dry hair to smooth frizz and add shine. 

^*    Results observed on curly, frizzy hair after 24 hours in 80% relative humidity, with one application of molecular repair hair oil on dry or damp hair
^**   Results observed after one application of molecular repair hair oil on dry hair
^***  Results observed on bleached/damaged hair after one application of molecular repair hair oil on dry hair
^**** Results observed after one application of molecular repair hair oil and application of 450 degree flat iron on dry hair.

K18 Damage Shield Conditioner is a nourishing, protective conditioner that helps shield hair from daily damage to help maintain hair health and improve smoothness and shine. Engineered to weightlessly soften and detangle while the K18PEPTIDE™ helps replenish hair during washing.

Clinically proven to provide conditioning protection against damage from UV rays, mechanical styling, and environmental aggressors for up to 3 days*. Fortifies, softens, and detangles hair.

• Defends against damage: Conditioning protection against damage from UV rays, environmental aggressors, and daily mechanical styling for up to 3 days
• Maintains hair health: Fortifies hair’s exterior lipid barriers to make hair more resilient and resistant to damage. K18PEPTIDE™ replenishes protein lost during washing.
• Enhances hair’s natural shine: pH-optimised formula minimises excess cuticle swelling during washing to help keep hair smooth and maximise shine.
• Softens, smooths, and detangles: Without film-forming silicones or waxes that can build up over time and weigh hair down.

How to use: Apply a small amount of K18 Damage Shield Protective Conditioner from mid-lengths to ends and build as needed. Rinse thoroughly. For best results, use after shampooing with K18 Damage Shield Shampoo.

*Clinically proven to provide conditioning protection against damage from UV rays, mechanical styling, and environmental aggressors for up to 3 days¹

The K18 Damage Shield Shampoo is a cleansing shampoo microdosed with the patented K18PEPTIDE™. Powerful yet non-stripping formula is designed with an optimised pH that is safe enough for everyday use, helping to reduce excess swelling of the hair cuticle during washing to help prevent frizz, preserve colour and enhance shine. A non-stripping lather deeply cleanses hair and scalp. Colour safe formula deeply cleanses hair while being gentle on the scalp. Dermatologist tested. 

How to use: Can be used daily. Massage into hair and scalp. Rinse thoroughly. Repeat as needed. 

Previously known as Peptide Prep pH Maintenance Shampoo. Same formula - new name.

K18 Leave in Molecular Repair Hair Mask is a professional leave-in treatment mask that works on the molecular level to reverse hair damage in just 4 minutes. Powered by the K18PEPTIDE™, clinically proven to repair damage caused from bleach + colour, chemical services and heat* – delivering immediate and lasting results that restore strength, softness, smoothness and bounce. This formula is vegan, colour-safe, cruelty free and suitable for all hair types.

What is K18PEPTIDE™?

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*.

Key benefits:

Deeper damage repair – 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.

Immediate and lasting results – hair is repaired from the first use and lasts past your next wash, for ongoing reparative benefits.

No rinse, leave-in convenience - convenient, leave-in formula works in just 4 minutes, with no extra rinse required.

Effective on all hair types – because K18PEPTIDE™ targets on a molecular level (where all hair is the same), it works for straight, wavy, curly, coily, fine, thick, or chemically-treated hair.

What to do - and what to avoid

Do:

• Clarify before K18 if you’re a heavy product user (demineralize for mineral + metal buildup).
• Apply on clean, damp hair.
• Wait the full 4 minutes before combing or styling.
• Add whatever styling products you love after the 4 minutes.
• 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).
• Overdo it—less is more.
• Rinse it out.

How to use the K18 Hair Mask: Shampoo, do not condition. Towel-dry thoroughly. Apply 1-3 pumps depending 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.

Pro Tip: For the most visible transformation, use K18 for the first 4–6 washes in a row. Then, switch to every 3–4 washes to maintain strong, healthy hair.

The K18 AstroLift™ Reparative Volume Spray is a lightweight, buildable volume spray, powered by K18PEPTIDE™ to reverse bounce-depleting damage that can impact all hair types--especially fine, fragile, aging + breakage-prone hair. Hair fiber thickening, non-sticky blend helps hair look and feel fuller, delivering flexible volume for up to 2 days*-with or without heat styling on dry or towel-dried hair.

Benefits:

• Formulated with the K18PEPTIDE™ to reverse the damage that can impact all hair types--especially fine, fragile, and aging hair.
• Hair fiber volumising blend increases hair diameter up to 25% + creates space between strands for a fuller look + feel.
• Humidity-resistant, sustainable +renewable natural polymer acts as a protective, weightless barrier against humidity.
• Not heat or tension activated - formulated to work no matter how you style your hair, helping minimise heat + mechanical damage during styling.

*Results observed in improvements to hair volume by expert grading on 34 subjects after 1 application of AstroLift™ reparative volume spray up to 48 hours.

How to use: Shake well. Hold the bottle 4-6 inches from roots + hair, spray generously throughout. Blow dry for added volume.

Introducing the K18 Heat Bounce, a next-generation leave-in heat protectant that goes deeper than traditional formulas to shield hair from damage. Powered by resilicore™ heat-shielding technology, it penetrates into the hair’s inner cortex to fortify from within, delivering powerful protection and visibly healthier results.

Benefits:

• 85% less breakage after blow drying*.
• Leave-in conditioner.
• 450°F (232°C) cuticle to cortex heat protection*.

*Reduction in hair breakage observed in clinical testing after application of high heat blow dry on wet hair.

How to use: Apply throughout sectioned hair, brushing through to help with even distribution. Use on towel-dried hair before blow drying and on dry hair before hot tools.

The first triple-action purple shampoo to remove metals + minerals, neutralize existing brass, and defend against future brassiness for blonde like new, hair like new*. TripleBright is not a color-depositing purple shampoo. Traditional purple shampoos temporarily tone hair with basic color correction that can turn hair purple, but don’t target the underlying cause of brassiness: oxidation, such as metals + minerals in hard water. TripleBright is a breakthrough triple-action formula that not only neutralizes existing brassiness without turning hair purple, but 1 wash removes up to 3 months of brass from hard water*, while also defending against future brass. The non-staining, easy-to-apply foam rinses with water and allows for targeted application. 

TripleBright works on all hair types and textures. It brightens all highlighted and lifted tones by defending against oxidative stress and reducing brass- delivering brighter, longer-lasting blonde for everyone. When used as directed, TripleBright purple shampoo’s precision violet technology expertly neutralizes brassiness without overtoning or staining. It will not stain your hands or clothes. K18 recommend using 2-3 pumps of TripleBright purple shampoo per application. Apply to wet hair, distributing evenly and lathering from roots to ends. 

Benefits:

• 1 wash removes up to 3 months of brass from hard water*.
• Neutralizes brassiness without staining or overtoning.
• Ideal hair tone is restored and evened* for all highlighted and lifted tones.
• Easy-to-apply foam.

Powered by K18 triple-action technology:

• Removes brass-inducing metals and minerals with ionic detox.
• Neutralizes brassiness with precision violet technology that won’t stain or overtone.
• Defends against future brass with biopolymer to help prevent reattachment of metals + minerals during washing.

*Results reflect removal of hard water minerals and metals equivalent to three months of unfiltered tap water exposure on bleached tress, based on scientific testing following 1 application of TripleBright.

*Results observed on 37 bleached/highlighted subjects after 3 weeks of use at least once a week.

How to use: Apply foam shampoo to wet hair, distributing evenly, lathering from roots to ends. Let sit for 1-3 minutes then rinse.

A limited-edition K18 x Future Society collab. Biology-first molecular hair repair mask scented with fragrance inspired by extinct flower DNA. 

K18 Leave in Molecular Repair Hair Mask is a professional leave-in treatment mask that works on the molecular level to reverse hair damage in just 4 minutes. Powered by the K18PEPTIDE™, clinically proven to repair damage caused from bleach + colour, chemical services and heat* – delivering immediate and lasting results that restore strength, softness, smoothness and bounce. This formula is vegan, colour-safe, cruelty free and suitable 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.

What is K18PEPTIDE™?

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*.

Key benefits:

Deeper damage repair – 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.

Immediate and lasting results – hair is repaired from the first use and lasts past your next wash, for ongoing reparative benefits.

No rinse, leave-in convenience - convenient, leave-in formula works in just 4 minutes, with no extra rinse required.

Effective on all hair types – because K18PEPTIDE™ targets on a molecular level (where all hair is the same), it works for straight, wavy, curly, coily, fine, thick, or chemically-treated hair.

What to do - and what to avoid

Do:

• Clarify before K18 if you’re a heavy product user (demineralize for mineral + metal buildup).
• Apply on clean, damp hair.
• Wait the full 4 minutes before combing or styling.
• Add whatever styling products you love after the 4 minutes.
• 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).
• Overdo it—less is more.
• Rinse it out.

How to use the K18 Hair Mask: Shampoo, do not condition. Towel-dry thoroughly. Apply 1-3 pumps depending 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.

Pro Tip: For the most visible transformation, use K18 for the first 4–6 washes in a row. Then, switch to every 3–4 washes to maintain strong, healthy hair.