K18 Damage Shield Protective Conditioner — 8.5 fl oz lightweight leave-in for damaged, color-treated hair; detangles & protects

K18 Damage Shield Protective Conditioner is a leave-in conditioner that nourishes and protects damaged hair from daily wear while boosting smoothness and shine.

Designed to sit between K18 treatment mask sessions, this lightweight conditioner reinforces the hair’s outer barrier and helps reduce the effects of UV exposure, pollution and mechanical styling. The formula replenishes protein lost during washing, keeps cuticles flatter for better shine, and offers detangling and softening benefits without using film-forming silicones or waxes that can cause buildup.

How does this conditioner protect hair from everyday damage?

The conditioner forms a protective layer around each strand that helps resist environmental stressors and styling friction for up to three days after application. It’s optimized to reduce excess cuticle swelling from washing, which helps preserve smoothness and reduces the chance of breakage.

• Shields against UV-related damage in simulated testing for up to three days
• Helps reduce pollution deposits on hair in simulated exposure studies
• Firms up the exterior lipid barrier to improve resilience

What does K18PEPTIDE do in this conditioner?

K18PEPTIDE is included to replenish protein lost during shampooing and styling, supporting the hair’s structural integrity. It works alongside barrier-supporting ingredients to maintain strand strength without weighing hair down.

• Targets protein loss from routine washing and styling
• Supports stronger-looking hair and reduced breakage risk
• Compatible with periodic K18 treatment masks for layered care

Will this conditioner weigh hair down or cause buildup?

No — the formula is pH-optimized and free from film-forming silicones and waxes, so it detangles and smooths without leaving a heavy residue. That makes it suitable for daily use between deeper K18 treatments while preserving natural movement and shine.

• Lightweight texture detangles without coating strands
• Minimizes excess cuticle swelling to enhance gloss
• Safe for regular use in most haircare routines

How should I use this product in my routine?

Apply after cleansing and towel-drying: work a small amount through mid-lengths to ends, leave in and style as usual. It’s formulated to provide ongoing protection and smoothing for days, bridging the gap between K18 treatment mask sessions.

• Use on damp hair after shampooing and before styling
• Focus on mid-lengths and ends where damage shows first
• Pair with K18 treatment masks for more intensive repair days

Who is this for? K18 Damage Shield Protective Conditioner is ideal for people with color-treated, chemically processed, heat-styled, or environmentally stressed hair who want a lightweight daily conditioner that detangles, fortifies and helps protect against UV, pollution and mechanical damage. It’s especially useful for anyone using K18 treatment masks who needs a non-build-up conditioner to maintain smoothness and shine between deeper treatments.

Ingredients

Water (Aqua) (Eau),Isopropyl Palmitate,Stearyl Alcohol,Propanediol,Isopentyldiol,Behentrimonium Chloride,Tocopherol,Tocopheryl Acetate,sh-Oligopeptide-78,Alteromonas Ferment Extract,Prunus Amygdalus Dulcis (Sweet Almond) Oil,Simmondsia Chinensis (Jojoba) Seed Oil,Phospholipids,Jojoba Esters,Calcium Gluconate,Hydroxypropyl Guar Hydroxypropyltrimonium Chloride,Ceramide NP,Phytosteryl/Isostearyl/Cetyl/Stearyl/Behenyl Dimer Dilinoleate,Polyquaternium-16,Stearalkonium Chloride,Isopropyl Alcohol,Butylene Glycol,Gluconolactone,Phenoxyethanol,Sodium Benzoate,Citric Acid,Sodium Hydroxide,Fragrance (Parfum),Hydroxycitronellal.