Hero image 0 of 2PCS-K18 Leave-In Molecular Repair Hair Mask 5 oz/150ml, 0 of 5
2PCS-K18 Leave-In Molecular Repair Hair Mask 5 oz/150ml
Key item features
- This leave-in mask leverages the patented K18Peptide™, a biotech-engineered compound that mimics the natural keratin structure. In just four minutes, it penetrates to the hair's core—reconnecting broken polypeptide chains and disulfide bonds at the molecular level. This delivers renewed strength, elasticity, smoothness, softness, and bounce that lasts beyond just one wash.
- Designed to reverse the effects of bleach, color treatments, chemical services, and heat damage, this mask provides both immediate and lasting repair. Its effectiveness has been clinically validated, giving stylists and users confidence that even over‑processed, weakened strands can be restored to a healthier state with consistent use
- The creamy texture of the mask allows for effortless, lightweight application on damp hair after shampooing—no rinse required. Within just four minutes, it delivers transformative results, simplifying the salon or at-home routine and saving time without compromising repair performance.
- Because it works at a molecular level—the foundational structure common to all hair—the mask is universally effective, whether hair is straight, curly, coily, fine, or thick. It's also vegan, color-safe, cruelty-free, and formulated with a gentle pH optimized (around 5–6) to promote cuticle resilience and minimize swelling.
- Esteemed as a top-tier leave-in mask by leading beauty publications, Vogue highlights its fast-acting peptide technology and ability to lower pH (keeping cuticles tight and preserving color and moisture) while stylists like Travis Ogletree report visible, manageable improvements in client hair. The light floral scent (jasmine and peony notes) adds a luxurious sensory touch.
Specs
- Hair typeAll Hair Types
- Hair care key benefitsRepairing
- Active ingredientsno
- Size5FL oz/150ml
- Container typeBottle
- Result time4 min
Current price is USD$155.95
Price when purchased online
- Free shipping
Free 30-day returns
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Ships to
Arrives by Fri, Jun 12
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Sold and shipped by Beauty Express
4.483333333333333 stars out of 5, based on 180 seller reviews(4.5)180 seller reviews
Free 30-day returns
More seller options (1)
Starting from $155.99
About this item
Product details
Professional, at-home hair treatment mask with a patented peptide. K18 Leave-In Molecular Repair Hair Mask 5 oz repairs and restores your keratin levels while strengthening the cuticle of each strand from root to tip for more youthful vibrancy! A cupboard full of products can't give you the results that K18's new leave in treatment does! When it comes to damage control, this is all you need. This easy-to-use formula penetrates deep into your strands for repair on every level. The microscopic level where Keratin meets Keratin is restored by K18Peptide so less breakage occurs. Alongside repairing damaged proteins, there's a conditioning ingredient that strengthens any weakened or brittle areas.
Restore your hair with this at-home, leave-in treatment
From heat to chemicals, this mask repairs the damage for stronger, smoother hair
Relaxes each strand for a more youthful look and feel
Rejuvenates roughness with hydrolyzed collagen
- This leave-in mask leverages the patented K18Peptide™, a biotech-engineered compound that mimics the natural keratin structure. In just four minutes, it penetrates to the hair's core—reconnecting broken polypeptide chains and disulfide bonds at the molecular level. This delivers renewed strength, elasticity, smoothness, softness, and bounce that lasts beyond just one wash.
- Designed to reverse the effects of bleach, color treatments, chemical services, and heat damage, this mask provides both immediate and lasting repair. Its effectiveness has been clinically validated, giving stylists and users confidence that even over‑processed, weakened strands can be restored to a healthier state with consistent use
- The creamy texture of the mask allows for effortless, lightweight application on damp hair after shampooing—no rinse required. Within just four minutes, it delivers transformative results, simplifying the salon or at-home routine and saving time without compromising repair performance.
- Because it works at a molecular level—the foundational structure common to all hair—the mask is universally effective, whether hair is straight, curly, coily, fine, or thick. It's also vegan, color-safe, cruelty-free, and formulated with a gentle pH optimized (around 5–6) to promote cuticle resilience and minimize swelling.
- Esteemed as a top-tier leave-in mask by leading beauty publications, Vogue highlights its fast-acting peptide technology and ability to lower pH (keeping cuticles tight and preserving color and moisture) while stylists like Travis Ogletree report visible, manageable improvements in client hair. The light floral scent (jasmine and peony notes) adds a luxurious sensory touch.
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Specifications
Brand
K18
Hair type
All Hair Types
Hair care key benefits
Repairing
Active ingredients
no
Indications
Skin Care Concern
Fine Lines
Directions
Instructions
Apply to damp hair after shampooing, no rinse required.
Warranty
Warranty information
No Warranty
Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.
Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.
Ingredients
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.
Active Ingredients
no
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Showing 1-3 of 12 reviews
Jul 20, 2025
Mary
5 out of 5 stars review
Verified Purchase
Hair feels amazing and comfortable.
I use it as my every time conditioner because I have very fine, very dry hair. It makes my hair feel thicker and comfortable. What's amazing is it's about 1/20th the cost of Amazon for the very same product in a much smaller size. No more static hair!
Helpful?15A8KX1HKGD39598115425
Oct 7, 2025
Rhonda
5 out of 5 stars review
Verified Purchase
Pleased with this value
Great product, price and fast shipping.
Helpful?15A8KX1HKGD39598115425
Aug 11, 2025
Lizbeth
5 out of 5 stars review
Verified Purchase
Love that I got 2 but the bottles are kind of tiny but great product
Helpful?15A8KX1HKGD39598115425
