Product Overview If your hair is starting to show the effects of bleaching, colouring, heat styling and chemical treatments then the Olaplex No.4 Bond Maintenance Shampoo will leave your hair feeling nourished and soft whilst strengthening the hair structure from first use. Actively increase moisture levels and enhance shine in your hair for a salon-quality, glossy finish without compromising your favourite colour. How to use: Massage into damp hair into a lather, rinse and follow with the No5 Bond Maintenance Conditioner.