Redken Extreme Length Primer is developed with biotin to strengthen from root to tip and specifically targets split ends. Use the Extreme Length system of Shampoo, Primer and Sealer to achieve your maximum hair length - up to 6" in a year.
How to use:
For best results use after Extreme Length Primer and Shampoo. Brush directly on to fragile or damaged areas of hair or all-over. Do not rinse out. Style as usual