K18 Leave-In Molecular Repair Hair Mask — 0.5 fl oz, 4-Minute Peptide Treatment for Damaged & Color-Treated Hair

K18 Leave-In Molecular Repair Hair Mask is a 4-minute peptide treatment that helps reverse signs of chemical, color, and heat damage for softer, stronger, more resilient hair.

This concentrated leave-in mask uses the patented K18PEPTIDE to work beneath the cuticle and reconnect broken polypeptide chains, helping hair regain strength and elasticity faster than surface conditioners alone. Formulated for use after shampooing, it’s designed to be left in and activated in four minutes, delivering visible texture and manageability improvements after just a few treatments.

How quickly will I see results with the K18 peptide mask?

Most users notice improved softness and easier detangling after 2–3 uses, with a single 4-minute session providing immediate smoothing and manageability. The formula builds cumulative benefits when used for 4–6 consecutive washes, then maintained as needed.

• Instant payoff: visible texture and frizz control after one application
• Cumulative repair: stronger, more elastic strands after several treatments
• Recommended routine: use for 4–6 washes initially, then as required
• Time investment: only four minutes per treatment

What types of damage can this leave-in mask address?

The K18PEPTIDE targets internal hair structure rather than only smoothing the outer cuticle, helping to address damage from bleaching, coloring, chemical services, and heat styling. It’s suitable for all textures, including straight, wavy, curly, and coily hair, because it works at a molecular level common to all hair types.

• Color and bleach: helps partially reverse structural weakening from lightening and dyes
• Chemical services: supports strands compromised by perms or relaxers
• Heat damage: improves flexibility and reduces breakage from styling
• All textures: effective for fine to coarse, straight to coily hair

How do I use the K18 Leave-In Molecular Repair Hair Mask correctly?

Apply to clean, towel-dried hair immediately after shampooing and skip conditioner for the treatment step. Dispense 1–3 pumps depending on hair length and thickness, smooth through the lengths and ends, leave the product in for four minutes, then style as usual without rinsing to lock in the peptide action.

• Step 1: Shampoo and towel-dry hair; do not condition before use
• Step 2: Apply 1–3 pumps through mid-lengths to ends
• Step 3: Wait four minutes—do not rinse—and proceed to style
• Step 4: For best results, use for 4–6 consecutive washes initially

Will this product make my hair feel heavy or greasy?

The leave-in cream is highly concentrated but designed to absorb into the hair shaft rather than coat the surface, so it improves softness and detangling without weighing strands down when used as directed. Adjust the amount you apply based on hair density: finer hair usually needs less product than thicker hair.

• Lightweight absorption: formulated to penetrate, not sit on top
• Customize dosing: 1 pump for short/fine hair, up to 3 for long/coarse
• No rinse: leave product in to maintain natural movement and bounce
• Manageable finish: smoother styling with reduced frizz

Who is this for: K18 Leave-In Molecular Repair Hair Mask suits anyone seeking a quick, potent repair step after chemical services or repeated heat styling—salons and at-home users alike. It is appropriate for all hair types and textures that need improved strength, elasticity, and manageability without heavy buildup. If you want a short, leave-in routine that targets internal damage and enhances softness and bounce, this peptide treatment is designed to integrate into busy grooming habits.

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.