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K18 Molecular Repair Hair Products
K18 changed what repair means. Instead of coating the hair, the patented K18Peptide reconnects the broken polypeptide chains that bleach, color and heat tear apart, working in four minutes with no rinse. It is the repair line Cris reaches for when a client's hair has been through a correction or a big blonde transformation.
The ritual is short and precise: the Leave-In Molecular Repair Hair Mask as the core, the Molecular Repair Hair Oil for finish, and the Peptide Prep shampoos to keep the canvas clean so the peptide can work.
Who K18 works best for
Bleached, highlighted and color-treated hair, hair damaged by heat styling, and anyone whose hair feels gummy, stretchy or fragile when wet. Safe across hair types and textures.
K18 products
11 items
Routines with K18
Curated kits that include K18, at a bundle price. See all kits and deals.
K18 Questions
How do I use the K18 Leave-In Molecular Repair Mask?
Shampoo, skip conditioner, and towel dry. Apply one to three pumps from ends to roots, wait four full minutes without touching it, then style as usual. Use it for four to six washes in a row after a color service, then every three to four washes to maintain.
Can K18 fix hair damaged by bleach?
K18 repairs the internal structure that bleach breaks, which is why it is the standard aftercare in our studio after blonding and color correction. It does not replace a trim for split ends, but it restores strength and elasticity that surface conditioners cannot reach.
Should I use K18 or Olaplex?
They repair different bonds. K18 rebuilds the keratin chain itself, while Olaplex relinks disulfide bonds. Many of Cris's blonde clients use both: K18 after a big service, Olaplex in the weekly routine. If you only pick one after heavy lightening, start with K18.
Are the K18 products at CRIS HAIR authentic?
Yes. Every K18 product in the shop is sourced through authorized professional channels, the same supply Cris uses in the studio, and is the retail size sold on the official brand website.
How fast is shipping, and is it free?
Orders ship from our studio in Malden, MA. Shipping is a flat $8.95, and free on orders of $85 or more anywhere in the US.