Polytar Plus is indicated as an aid in the treatment of scalp disorders such as psoriasis, seborrhoea, pruritus, and dandruff. Polytar Plus is also of value in the removal of ointments and pastes used in the treatment of psoriasis.If you suffer with an itchy, flaky scalp that drives you absolutely crazy. If you can only be able to use beauty shampoo's every now and again, as regular use of a beauty shampoo will irritate your scalp no end.