K18 Leave-In Molecular Repair Hair Mask — Limited-Edition Scent, 1.7 fl oz | 4-Min Peptide Repair for Bleach, Color & Heat Damage

K18 x Future Society Leave-In Molecular Repair Hair Mask is a biology-first peptide treatment that reverses chemical and heat damage in four minutes while leaving hair noticeably stronger and softer.

This limited-edition collaboration blends K18's patented K18PEPTIDE technology with a biotech fragrance inspired by extinct-flower DNA for a multi-sensory hair-repair experience. The lightweight, leave-in cream targets damage at the interior of the strand rather than only smoothing the cuticle, making it suitable for all textures—from fine and straight to coily and densely packed curls. Use after shampooing and skip conditioner for an easy treatment that begins to show improvement within a few washes.

How does the K18 mask repair damage so quickly?

The formula contains K18PEPTIDE, a bioactive peptide engineered to reconnect broken polypeptide chains and support disulfide bond recovery inside the hair fiber. Because it works at the molecular level, it restores structural integrity rather than temporarily coating the surface. Results are intended to appear after a few consecutive applications and become more noticeable with continued use.

• Patented peptide mimics keratin binding sites to reconnect internal bonds.
• Works from the cortex outward, not only on the cuticle.
• Visible improvement in strength and manageability after 2–3 uses.
• Four-minute, leave-in protocol for quick treatment during your routine.

Will this work on chemically treated, bleached, or color-treated hair?

Yes—the mask was developed specifically to address damage commonly caused by bleaching, coloring, relaxing, and heat styling. It helps rebuild internal structure that these processes disrupt, improving elasticity and reducing breakage when used as directed. It can be incorporated before styling to support ongoing salon services.

• Targets breakage from chemical services and thermal stress.
• Safe to use on colored and bleached hair as part of maintenance.
• Recommended protocol: 4–6 consecutive washes, then as needed maintenance treatments.
• Apply on clean, towel-dried hair; do not rinse after 4 minutes.

How do I use this leave-in mask in my weekly routine?

After shampooing, skip conditioner and apply 1–3 pumps to towel-dried hair depending on length and thickness. Work evenly through the mid-lengths and ends, leave the product in for four minutes, then style as usual—no rinse required. For best results, use for 4–6 washes consecutively, then continue as a maintenance treatment once or twice weekly or when hair feels stressed.

• Step 1: Shampoo and gently towel-dry hair.
• Step 2: Dispense 1–3 pumps; distribute through mid-lengths and ends.
• Step 3: Wait 4 minutes; do not rinse, then style as normal.
• Step 4: Use consecutively for 4–6 washes, then as needed.

What results can I expect for texture, frizz, and manageability?

The concentrated cream is designed to improve strength and smoothness while aiding detangling and reducing frizz. Because the peptide restores structure within the hair, strands often feel less brittle and respond better to styling—yielding improved bounce and a softer surface appearance. Results accumulate with repeated use, especially when paired with gentle shampooing and heat protection.

• Improves manageability and reduces tangling for easier styling.
• Enhances softness and surface smoothness without heavy residue.
• Helps hair retain shape and bounce while limiting breakage.
• Multisensory finish from the limited-edition biotech-inspired fragrance.

Who is this for: This limited-edition K18 x Future Society mask is for anyone wanting a science-driven approach to reverse and prevent hair damage—especially those with chemically processed, heat-styled, or naturally fragile hair. It suits all textures and densities, and works well for people seeking quick, in-shower-adjacent treatments that fit a busy routine while delivering measurable improvement in strength, smoothness, and manageability.

Ingredients

Water (Aqua) (Eau), Alcohol Denat., Propylene Glycol, Cetearyl Alcohol, Dicaprylyl Ether, Cetyl Esters, Behentrimonium Chloride, Polysorbate 20, sh-Oligopeptide-78, Hydrolyzed Wheat Protein, Hydrolyzed Wheat Starch, Isopropyl Alcohol, Tocopherol, Phenoxyethanol, Potassium Sorbate, Citric Acid, Fragrance (Parfum), Benzyl Alcohol, Benzyl Salicylate, Beta-Caryophyllene, Citrus Aurantium Bergamia Peel Oil, Limonene, Linalool, Linalyl Acetate, Pinene, Terpineol, Terpinolene, Tetramethyl Acetyloctahydronaphthalenes.