
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 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.
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, restoring hair's strength, softness, and elasticity in just 4 minutes without rinsing. Powered by the patented K18Peptide™ technology, this lightweight, leave-in formula reconnects broken keratin chains deep within the hair cortex, delivering a salon-quality repair that lasts wash after wash, leaving every strand visibly smoother, stronger, and beautifully manageable.
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Estimated delivery: 1–3 business days
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A patented peptide complex that provides intensive hydration and repair to damaged hair strands while maintaining lightweight softness without weighing hair down.

Natural oil extracts that nourish hair follicles and roots while supporting the natural protective barrier of the scalp, providing deep moisture and shine.
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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