Original Tecnu has been used extensively by utility linemen and forestry workers for years. Now Tecnu Extreme® improves on the original. Just like the original, Extreme, removes the resinous, rash-causing oil of poison ivy, oak and sumac from the skin if applied within four to eight hours of exposure. In addition, Tecnu Extreme not only stops the spread of the rash after an outbreak but also contains an active ingredient to relieve the painful itching. 4-oz. tube. Made in USA.