Olaplex No. 3 Hair Perfector is a pre-shampoo hair treatment designed to reduce breakage and split ends for visibly healthier hair. It uses patented OLAPLEX Bond Building Technology™ to relink broken disulfide bonds damaged by chemical services, heat, and styling. Suitable for fine, medium, and thick hair types and for all hair textures including coily, curly, straight, and wavy. It addresses common hair concerns such as frizz, dryness, damage, split ends, and breakage. Key benefits include reducing breakage and split ends, visibly strengthening hair, and restoring healthy appearance and texture. The treatment is vegan and cruelty-free and formulated without Lilial. Main ingredient is Bis-Aminopropyl Diglycol Dimaleate which helps repair broken bonds for stronger hair. Usage: apply a generous amount on damp hair from roots to ends, comb through, leave on for at least 10 minutes, rinse, shampoo, and condition. For best results, use with Olaplex Bond Maintenance® System (No. 4 Shampoo and No. 5 Conditioner).