Tecnu is an effective waterless cleanser capable of removing radioactive dust from the skin and clothing. Tecnu would cleanse poison plants oils after exposure to poison ivy and other poison plant . tecnu gets to the root of the problem by first working to remove the rash causing toxin urushiol from the skin.
Tecnu is a wash you buy in the store. What it does is if you know you have been in contact with poison ivy, you go in right away and wash the infected area with Tecnu. The Tecnu helps get the poison ivy oil off your skin.
Tecnu does not prevent poison ivy. Technu is a soap that hepls to remove the oils from the poison ivy. The soap stop the oils from being soaked into the skin relieving the skin of the itching and burning. It is used as a treatment not as a preventative measure.