Technu poison oak and ivy treatment is an outdoor skin cleanser that removes the poison oils that cause rash and itching. Technu outdoor skin cleanser cleans and decontaminates skin, clothing pets & tools by removing toxic oils of poison oak, ivy and sumac. Used within 2-8 hours, it removes the poison before the rash begins. Once the rash has started, it helps stop the rash from spreading and promotes healing. 4 oz bottle.