Lock & Seal Oil. This product is: . An anti-breakage bonding oil that rebonds split ends up to 5 washes.. Good for:. . Damaged or dry hair with split ends and breakage. Curly, textured, relaxed, and color-treated hair. Dry, sensitive, irritated scalps. High and low porosity hair. . Why we love it:. This is not your average hair oil. Moisturizing plant oils are boosted by our innovative Anti-Breakage Technology that rebonds hair cuticles damaged by heat styling, straightening, bleaching, and brushing. Lock & Seal is engineered to seal down damaged hair cuticles and split ends for up to 5 washes while increasing moisture retention so your hair stays smooth and shiny between wash days..