Redken

The Redken Extreme Length Sealer is a concentrate with biotin for the hair lengths and ends . The Extreme Length Leave-in Treatment with Biotin helps seal the split ends and reduces split ends up to 87% in a year using a routine of shampoo, conditioner and leave-in. The leave-in treatment also contains soy protein, which supplies the hair with moisture. application Apply with the application brush to towel-dried hair on lengths and ends. Do not rinse. Style as usual. Can also be used again on dry hair if necessary. Use after Extreme Length Primer for best results.