The System Professional Deep Cleanser with its deeply effective tenside formula frees overloaded and stressed hair from residues and at the same time it gentle on the scalp and hair structure. Treatment before perm and non permanent colours. Completely frees hair from residues. Gentle on the scalp and the hair structure . For In salon use only. Your SP stylist recommends: Distribute evenly into damp hair and massage gently. Leave for two minutes. Rinse thoroughly.