K18 Leave-In Molecular Repair Hair Mask — 0.5 fl oz peptide treatment, 4-minute damage repair

K18 Leave-In Molecular Repair Hair Mask is a 4-minute peptide treatment that repairs chemical, heat, and color damage by reconnecting hair’s internal bonds for stronger, smoother strands.

This concentrated, leave-in cream uses the patented K18PEPTIDE to penetrate the hair’s inner structure rather than just coating the cuticle. In a short salon-style treatment you get improved texture, easier detangling, and restored elasticity without rinsing, making it a practical add-on to regular shampooing. The 0.5 fl oz size is ideal for trial, travel, or targeted use on ends and damaged sections.

How does K18 reverse hair damage so quickly?

The formula contains a biotech-designed peptide that bonds with the hair’s keratin framework, helping to reconnect broken polypeptide chains and disulfide bonds. That repair at the molecular level restores strength and flexibility, which translates to visible improvements in texture and manageability after just a few uses.

• Patented K18PEPTIDE targets the hair’s inner structure, not just the surface.
• Works on damage from bleach, color, chemical services, and heat.
• Visible benefits often appear after 2–3 treatments; full protocol uses 4–6 consecutive washes.

What’s the correct way to use this leave-in mask?

Apply the treatment to freshly shampooed, towel-dried hair and skip conditioner. Dispense 1–3 pumps depending on length and texture, distribute through hair, wait four minutes, and leave in—do not rinse. Style as usual afterwards.

• Use on clean, damp hair for best peptide activation and penetration.
• Follow an initial series of 4–6 consecutive applications, then use as needed.
• Amount varies: shorter hair needs less, thick or long hair needs more pumps.

Will this work for my hair type and styling routine?

Because the peptide acts on the hair’s internal bonds, it’s effective across textures—straight, wavy, curly, and coily. It integrates easily with styling: apply the mask, wait four minutes, then use heat tools or air-dry as you normally would without rinsing out the product.

• Safe for chemically treated, color-treated, and heat-styled hair.
• Suitable for all textures, including coily and curly hair that benefit from internal repair.
• Can be used before heat styling for added resilience and smoother results.

How soon will I notice changes and what should I expect?

Many users report softer, more manageable hair after the first few treatments, with fuller improvements after the recommended 4–6 consecutive uses. Results include reduced breakage, less frizz, better elasticity, and easier detangling—though individual outcomes vary by hair history and extent of damage.

• Some improvement often visible after 2–3 applications; optimal effects after initial protocol.
• Helps reduce breakage and tangling while improving bounce and smoothness.
• Maintained with occasional touch-up applications as needed.

Who is this for: This K18 mask is designed for anyone seeking a fast, science-backed repair step—people with bleached, colored, chemically processed, thermally damaged, or naturally fragile hair will see the most benefit. It’s also a useful maintenance product for healthy hair that faces frequent styling stress and for travelers or first-time users wanting a compact, powerful treatment.

Ingredients

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.