Product Description

The K18 Leave-In Molecular Repair Hair Mask is a breakthrough biotechnology treatment designed to repair hair from within by reconnecting broken disulfide bonds — the fundamental building blocks damaged by color, chemical services, heat styling, and everyday stress. Powered by the patented K18PEPTIDE™, this leave-in mask restores strength, elasticity, softness, and bounce without rinsing.

This 1.7 oz size delivers more treatments for long-lasting transformation and deeper repair.

Key Benefits

• Repairs broken hair bonds at the molecular level
• Improves strength, elasticity, and resilience
• Leaves hair softer, smoother, and more manageable
• Lightweight, leave-in formula — no rinsing required
• Safe for all hair types, including color-treated and fragile hair

How to Use

Apply to damp, towel-dried hair (freshly shampooed, no conditioner).
Distribute evenly from mid-lengths to ends using fingertips or comb.
Do not rinse — style as usual.
Use every 3–4 washes or as needed for optimal repair.

Why We Love It at Soho House Beauty Lounge

This mask is a game-changer for restoring damaged hair without heaviness. We love how it strengthens and revitalizes from the inside out, making hair feel healthier, more resilient, and visibly softer after just one use. It’s the perfect at-home complement to salon treatments — especially for clients who color, bleach, or heat-style regularly.