Revive the appearance and feel of damaged hair with the K18 Leave-In Molecular Repair Hair Mask, a leave-in treatment formulated with patented K18PEPTIDE™ technology. The formula is designed to reverse hair damage caused by bleaching, coloring, chemical services, and heat styling while restoring the look and feel of strength, softness, smoothness, and bounce.

Unlike a traditional rinse-out hair mask, K18 is applied after shampooing and left in the hair. The treatment works in approximately 4 minutes, with no rinsing required. The full-size version contains 50ml of product.

Key Features

1. Genuine K18 Leave-In Molecular Repair Hair Mask
2. 50ml / 1.7 oz full-size
3. Patented K18PEPTIDE™ technology
4. 4-minute leave-in treatment
5. Designed to repair damage from bleach and color
6. Helps address damage from chemical services
7. Helps address heat-related hair damage
8. Restores the appearance of strength, softness, smoothness, and bounce
9. No rinsing required
10. Suitable for all hair types
11. Vegan and cruelty-free
12. Color-safe

Product Specifications

1. Brand: K18
2. Product: Leave-In Molecular Repair Hair Mask
3. Size: 50ml / 1.7 oz
4. Product Type: Leave-In Hair Treatment
5. Key Technology: K18PEPTIDE™
6. Application: Post-shampoo, towel-dried hair
7. Condition: New, if applicable

How to Use

1. Shampoo your hair and do not use conditioner.
2. Towel-dry thoroughly.
3. Apply 1–3 pumps, depending on hair length and density, starting at the ends and working toward the roots.
4. Allow the product to sit for 4 minutes.
5. Do not rinse. Comb and style as usual.

K18 recommends using the mask for 4–6 consecutive washes after a salon service, then using it as needed for maintenance.