Polytar Shampoo 150ml Polytar Shampoo 150ml Polytar Shampoo 150ml is a medicated scalp shampoo formulated with coal tar solution 4% to help relieve common scalp conditions such as dandruff, psoriasis, eczema, seborrhoeic dermatitis, itching, and scaling. It works by cleansing the scalp while helping to reduce flaking and irritation.