Cymex Cream (5g). Cymex cream for cold sores actively relieves, controls infection and promotes effective healing of cold sores and dry cracked lips.. For the application to cold sores and dry cracked lips.. Urea has keratolytic properties. Cetrimide is a quaternary ammonium disinfectant. Chlorocresol is a mild disinfectant. Dimeticone 350 acts as a water repellent
