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The K18 Molecular Repair Mist is a leave-in spray built on the brand's patented K18 peptide, which it says works inside the hair to reconnect broken keratin chains rather than coating the outside. It is aimed at damaged, bleached, color-treated and heat-styled hair, and K18 positions it as a prep step before chemical services as well as a daily refresher. Compared with bond-building rivals like Olaplex, it is a lighter, sprayable format that suits fine and oily hair better than a cream mask, though it is not a conditioner and does not add slip. Reviewers rate it well overall, with most praise for how it leaves hair feeling and complaints centering on the sprayer and the lack of detangling.
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Lowest price we've seen: $90.00 on Nov 13 at eBay. Tracked across 12 stores since Nov 13.
Reviewers rate it 4.5 out of 5 and mostly praise how hair feels after regular use, especially on bleached and color-treated hair. Complaints focus on the spray mechanism and on the lack of conditioning slip.
K18 Professional Molecular Repair Mist is a leave-in hair treatment in a spray bottle. It is designed to repair damaged hair by balancing keratin chains and restoring strength, including before chemical treatments.
It uses a patented peptide that penetrates the hair and targets damaged areas instead of only coating the strands. The formula is silicon-free and contains protein and keratin.
Apply it to towel-dried hair. It is made to repair, regenerate and strengthen hair and add shine.
