Polytar Scalp Shampoo is a shampoo containing the active ingredient coal tar. This is a thick, heavy oil which can reduce scales, inflammation and itchiness. Polytar Scalp Shampoo is used to treat scalp conditions such as psoriasis (thickened patches of inflamed, red skin, often covered by silvery scales), seborrhoeic dermatitis (red, scaly, itchy scalp), eczema (itchy skin rash), itchiness and scaling due to these conditions and dandruff.