 Owing to lactic acid's keratolytic properties (to break down hard skin cells) and urea's hydrating properties, Calmurid is used primarily in the treatment of dry, scaly skin.Ichthyosis and general dermatitis in the absence of inflammation are some of its indications.When the extra steroid component is added (as in Calmurid HC), it is used to treat dry, scaly skin that is accompanied by inflammation of the skin.