Olaplex Broad Spectrum is a high-powered chelating treatment that completely eliminates the buildup of metals, minerals, chlorine, copper, pollution and external agents that damage hair. It cleanses deep down to the cortex while maintaining the hair's moisture and essential proteins. Benefits Enhances vibrant color and consistent bleaching results; Allows better penetration and effectiveness of chemicals; Restores natural shine, softness and manageability; Clinically proven to remove 98% of build-up with one use. How to apply Wash hair with Olaplex No. 4C Bond Maintenance Clarifying Shampoo to remove surface dirt from the scalp. Apply Olaplex Broad Spectrum Chelating Treatment to the hair, massaging gently and leave on for 15-30 minutes. Wash hair with Olaplex No. 4 Bond Maintenance Shampoo or Olaplex No. 4P Blonde Enhancer Toning Shampoo. For extra hydration use Olaplex Moisture Mask 4 in 1.