Colour B4 Hair Colour Remover works to remove permanent and semi-permanent hair colour or unwanted dark tones and colour build-up. This gentle, ammonia-free and bleach-free hair colour remover can be used before any colour treatment. For very thick hair or hair longer than shoulder length, 2 boxes may be required. This kit contains 2 fl. oz. Bottle of Activator, 2 fl. oz. Bottle of Remover, 2 fl. oz. Bottle of Buffer, and one pair of gloves. Instructions for Use: Comb in, leave on for up to 60 minutes, and then rinse out.