K18 Hair Leave-in Repair Mask 50ml

A breakthrough in hair repair, this intensive leave-in treatment reverses damage from bleaching, chemical services, and heat in just 4 minutes. Hair is left permanently stronger, softer, smoother, and easier to manage—with visibly improved elasticity and resilience.

Powered by a patented peptide technology, the mask penetrates deep into the hair’s core to restore and rebuild broken keratin chains at a molecular level. After a decade of research, K18 is the first brand to harness biomimetic science to reconnect these chains—bringing hair back to its original, healthy state.

The result? Hair that looks, feels, and performs like new.

K18PEPTIDE™ a biotech-developed peptide that mimics hair's structure to reverse damage by reconnecting polypeptide chains and disulfide bonds broken during bleaching, color and chemical services + heat*.

pH-optimized (5.0-6.0) to help minimize cuticle swelling + put hair proteins in their most resilient state

Cream format enables easy, lightweight application across all hair types, with detangling and softening benefits

Vegan, color-safe, cruelty-free

Shampoo, do not condition. Towel-dry thoroughly Apply 3-9 pumps of K18 leave-in molecular repair hair mask based on your length and density, starting at the ends and working up towards the roots Let sit for 4 minutes. Do not rinse out Comb, add product + style as usual. Use for 4-6 washes post-salon service, then as needed

• Repair

Water (Aqua) (Eau), Alcohol Denat., Propylene Glycol, Cetearyl Alcohol, Dicaprylyl Ether, Cetyl Esters, Behentrimonium Chloride, Polysorbate 20,sh-Oligopeptide-78 (K18PEPTIDE™), Hydrolyzed Wheat Protein, Hydrolyzed Wheat Starch, Isopropyl Alcohol, Tocopherol, Phenoxyethanol, Potassium Sorbate, Citric Acid, Fragrance (Parfum), Geraniol, Linalool, Hexyl Cinnamal, Benzyl Alcohol.