K18 Hair Leave-in Molecular Repair Mask

$114.00 USD
By K18


This patented bioactive peptide treatment strengthens and improves elasticity while reversing damage from chemical services, thermal styling, and mechanical styling. For all hair types.

  • Bleach + Color
  • Heat
  • Chemical Services
  • Mechanical Styling

Hair like new. This leave-in mask heals and strengthens hair with lightweight moisturizing benefits to detangle and keep hair smooth and soft, without weighing it down. Please see dosage chart for exact usage. For best results, use for the first 4-6 consecutive washes following a service, and then every 3-4 washes as needed to maintain hair strength.


1. Shampoo, do not condition. Towel dry thoroughly.

2. Begin with 1 pump of K18 Mask and add more as needed depending on the length, thickness, and condition. Work evenly into hair, one pump at a time, from ends to roots.

3. Let sit for 4 minutes to activate.

4. Do NOT rinse out. Style as usual.

The dos & don'ts:

- DO use a clarifying shampoo if you’re a heavy product or dry shampoo user.

- DO dry thoroughly with hair towel or turban before application.

- DO wait the full 4 minutes before styling or applying another product.

- DO use every 4-6 shampoos consecutively to see and feel the
full results.

- DON’T condition your hair before applying K18.

- DON’T use too much.

- DON’T rinse it out.

Key benefits:

K18Peptide™ is the miracle molecule haircare was waiting for. Clinically proven to reverse damage in just 4 minutes.

You’ll discover:

- Like-new hair repaired from the inside out

- Healed damage from bleach, color, chemical services, heat, and mechanical styling

- Restored strength, softness, smoothness, and bounce

- Reduced breakage, split ends, and color fadepH balance of 5.0-6.0

- Doesn’t wash away with shampoo, leaving lasting results

- Vegan

- Color Safe

- Cruelty-Free