K18 Leave-In Molecular Repair Hair Mask Deep Conditioning Keratin Treatment Soften Hair Smoothing Healthy Hair Care 50ml 150ml
 
What it does & key benefits
 
The mask uses the patented K18PEPTIDE™, a biotech-developed peptide that mimics hair’s structure and reconnects broken polypeptide chains and disulphide bonds caused by bleaching, colouring, chemical services and heat damage. Sephora UK+3K18Hair+3K18Hair UK+3
 
It’s a leave-in treatment (you shampoo, don’t condition, apply the mask, leave it in) so the formula can penetrate the hair — you do not rinse it out. K18Hair+2Space NK+2
 
It works in just 4 minutes after application. K18Hair+1
 
Claims: restores strength, softness, smoothness, bounce; reduces breakage, split ends, colour fade. Space NK+1
 
Suitable for all hair types (fine, thick, curly, bleached) because the mechanism works on the molecular level where “all hair is the same”. K18Hair+1
🧴 How to use it
 
From the official instructions:
 
Shampoo your hair. Do not condition before applying the mask. K18Hair+1
 
Towel-dry so hair is damp but not dripping. K18Hair
 
Apply 1–3 pumps (or in some cases, “dime-sized amount”) depending on length/thickness. Start at the ends and work up towards roots. Sephora UK+1
 
Leave it in for 4 minutes. Do not rinse out. K18Hair UK+1
 
After that, you can comb, then apply your regular styling products. You can condition after the 4 minutes if you choose, but many users don’t need to. K18Hair
 
For the first “reset” phase: use the mask every shampoo for 4-6 washes (to rebuild). Then switch to maintenance (every few washes as needed). Capital Hair & Beauty