Joico K-PAK Colour Therapy Luster Lock is a leave-in-then-rinse treatment for color-treated or chemically damaged hair, combining African manketti oil, argan oil, and keratin with Joico's SmartRelease delivery system — a liposome technology that continues releasing rosehip oil, arginine, and keratin into the hair after it's applied, rather than depositing everything on contact.
It can be used two ways: as a quick rinse-out treatment on damp hair after shampooing, or as a pre-shampoo treatment applied to dry hair before washing. Either way, contact time is short — a few minutes, not a long overnight mask.