Transform distressed, tired hair with the Extreme Length Sealer Duo from Redken. Specially formulated with the brand's unique Interlock Protein Network to strengthen hair from root to tip & biotin to effectively prevent split ends & reduce breakage for healthy-looking locks. The treatment intensely conditions & smoothens hair & delivers a silky soft finish, without weighing you down. The innovative built-in brush tip seals split ends & ensures precise application to cover areas in need of moisture.