The fastest and easiest way to apply KSD is to squeeze a small amount at a time of KSD into your hands, rub your hands together and apply it to your DAMP or DRY hair with your fingers in the same way you would with shampoo and MASSAGE it into your roots and hair (see directions). If you prefer to use an applicator brush, that is fine, but it will take you longer as you would need to first section the hair and put the treatment into a glass or plastic bowl instead of your hands.