K18 Professional Molecular Repair Hair Mask 150ml

K18 Professional Molecular Repair Hair Mask — 150ml / 5 fl oz

Repair Damaged Hair at the Molecular Level

Some hair damage goes deeper than any conditioner can reach. K18 Professional Molecular Repair Hair Mask works where it matters most — inside the hair fiber itself — using patented biomimetic peptide technology to reconnect broken keratin chains and restore your hair to its strongest, healthiest state.

This is not a conditioning mask. This is molecular repair — clinically proven to reverse damage from bleach, color, chemical services, and heat in just 4 minutes.

How K18 Works

Hair damage happens when the polypeptide chains inside the hair fiber break down — caused by bleach, color, relaxers, perms, and repeated heat styling. Traditional masks and conditioners coat the outside of the hair but cannot reach or repair these internal breaks.

K18's patented K18PEPTIDE™ is a biomimetic peptide — engineered to mirror the natural structure of hair — that penetrates deep into the cortex of the hair fiber to reconnect broken keratin chains and restore the hair's natural strength, softness, and elasticity from within.

Key Benefits

• Reverses Damage: Clinically proven to reverse up to 4 levels of damage from bleach, color, chemical services, and heat styling.
• Restores Strength: Reconnects broken polypeptide chains to rebuild the hair's internal structure and restore tensile strength.
• Improves Softness and Elasticity: Hair feels noticeably softer, smoother, and more elastic after just one use.
• Reduces Breakage: Stronger internal bonds mean less breakage, split ends, and frizz over time.
• Works on All Hair Types: Suitable for all hair textures and types, including color-treated, bleached, chemically processed, and heat-damaged hair.
• No Rinse Required: Leave-in formula means the K18PEPTIDE™ stays in the hair to continue repairing — no rinsing needed.

Professional Grade Results at Home

Originally developed for professional salon use, K18 Professional Molecular Repair Hair Mask is now available for at-home use — giving you access to the same clinical-grade repair technology trusted by top colorists and stylists worldwide. The 150ml / 5 fl oz size is the professional-grade format, ideal for frequent use, salon professionals, or anyone with significant damage who wants lasting results.

How to Use

• Shampoo hair and remove excess water — do not condition.
• Apply a small amount of K18 mask evenly through hair from roots to ends.
• Leave in for a minimum of 4 minutes — do not rinse out.
• Style as usual. No rinsing required.
• For best results, use after every shampoo or as needed based on damage level.

Who Should Use It

K18 Professional Molecular Repair Hair Mask is ideal for anyone experiencing hair damage. It's a perfect fit for people who:

• Have bleached, highlighted, or color-treated hair that feels dry, brittle, or porous
• Have chemically processed hair from relaxers, perms, or keratin treatments
• Experience breakage, split ends, or excessive frizz from heat styling
• Want a professional-grade repair treatment they can use at home
• Are salon professionals looking for a reliable, results-driven repair mask for clients

Why Customers Love It

K18 has become one of the most talked-about hair care innovations in recent years — and for good reason. Customers consistently describe dramatic improvements in hair texture, softness, and manageability after just one use. Many report that severely damaged, over-processed hair feels transformed — softer, stronger, and more elastic than it has in years. For colorists and stylists, it has become an essential part of every color service.

Size and Format

This listing is for the 150ml / 5 fl oz professional-size bottle — the largest available format, ideal for salon professionals or frequent at-home users. A little goes a long way; use only the amount needed based on hair length and density.

Clean, Science-Backed Formula

K18 is free from parabens, sulfates, and phthalates. The formula is vegan and cruelty-free, built on patented biomimetic science that works with the natural structure of hair rather than masking damage with heavy silicones or conditioning agents.

For external use only. Avoid contact with eyes. If irritation occurs, discontinue use.

Make It Yours

Your hair deserves more than a surface-level fix. K18 Professional Molecular Repair Hair Mask delivers real, measurable repair at the molecular level — giving you stronger, softer, healthier hair from the inside out.

Add it to your cart now and experience the science of true hair repair.