Product Overview Make your hair stronger from root to tip with Redken Extreme Length Primer 150ml, which has been specially formulated to reduce any unwanted breakages, for lusher, fuller-looking locks. Benefits Enriched with biotin, this primer doubles to provide lightweight conditioning that will leave your hair feeling intensively treated. It is ideal for daily or weekly use, resulting in locks that are not only noticeably stronger, but also smooth to the touch.