Helps to smooth & prevent split ends. First-aid for split ends. This intensive serum is infused with Unifibrine, a smart complex of smoothing polymers. When applied, it's instantly attracted to more damaged areas, where it helps to smooth & unify the hair's surface. Directions for use: Rub a small amount between hands & work through the lengths & ends of clean, towel-dried hair. Style as usual. Do not rinse.