K18Peptide Core
A patented peptide complex that provides intensive hydration and repair to damaged hair strands while maintaining lightweight softness without weighing hair down.
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K18
K18 Leave-In Molecular Repair Hair Mask – 50ml
216.90
322.00
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- Leave-in formula for convenient care
- Deeply moisturizes and smooths hair
- Helps improve hair's appearance and feel
- Hair & Nails
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K18 Leave-In Molecular Repair Hair Mask is designed for people with color-treated or heat-damaged hair who want a quick repair treatment without rinsing. The formula uses K18Peptide technology to work at the molecular level, reconnecting broken keratin chains and restoring strength and softness in 4 minutes. It's ideal if you're looking for a lightweight leave-in treatment that delivers salon-quality results wash after wash.
K18Peptide™ (Patented Bioactive Peptide)
The hero ingredient that works at the molecular level to reconnect broken keratin chains within the hair cortex, reversing damage from bleach, color, chemicals, and heat. Delivers lasting repair that survives repeated washes.
Hydrolyzed Keratin
Fills in gaps along the hair shaft to smooth the cuticle, boost shine, and reduce frizz. Strengthens the outer structure of each strand for a visibly healthier appearance.
Panthenol (Provitamin B5)
Deeply penetrates the hair shaft to attract and retain moisture, improving flexibility, elasticity, and softness while helping to prevent breakage.
Behentrimonium Methosulfate (BTMS)
A gentle conditioning agent that detangles and smooths the hair cuticle, reducing static and leaving hair manageable, silky, and easy to style.
K18 Leave-In Molecular Repair Hair Mask 50ml
The K18 Leave-In Molecular Repair Hair Mask (50ml) is a breakthrough science-backed treatment that works at the molecular level to reverse damage caused by bleach, color, chemical services, and heat. In just 4 minutes, this no-rinse formula restores your hair's strength, softness, and elasticity without weighing it down.
How It Works
Powered by the patented K18Peptide™ technology, this lightweight leave-in formula penetrates deep into the hair cortex to reconnect broken keratin chains. The result is salon-quality repair that lasts wash after wash, leaving every strand visibly smoother, stronger, and beautifully manageable.
Key Benefits
- Reverses damage from bleach, color, chemical services, and heat
- Restores strength, softness, and elasticity in just 4 minutes
- No rinsing required for a streamlined hair care routine
- Lightweight leave-in formula suitable for all hair types
- Reconnects broken keratin chains at the molecular level
- Long-lasting salon-quality results that endure through washes
How to Use
After washing and towel-drying hair, apply a small amount evenly throughout the hair. Do not rinse. Style as usual. For best results, use after every wash until hair is fully restored, then once a week for maintenance.
Who It's For
Ideal for those with color-treated, bleached, chemically processed, or heat-damaged hair seeking a professional-grade repair at home.
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Estimated delivery: 1–3 business days
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Key Ingredients(2)
Repairing Natural Oils
Natural oil extracts that nourish hair follicles and roots while supporting the natural protective barrier of the scalp, providing deep moisture and shine.
How to Use
Apply an appropriate amount of the soothing mask to fully wet hair and scalp with lukewarm water. Massage the scalp very gently with your fingertips (avoid nails) in circular motions to ease tension and absorb soothing materials. Work the delicate and gentle lather through the lengths, then rinse your hair and scalp thoroughly with water.
Specs last updated: June 16, 2026
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