Tecnu Original Outdoor Skin Cleanser is a poison ivy wash designed to remove the rash-causing oil (urushiol) from your skin after exposure to poison ivy, poison oak, & poison sumac plants Removes skunk spray and tree sap from skin and pets Tecnu cleanses and removes residual urushiol (the resin from poison oak, ivy, and sumac) from skin, clothes, metals and pets. Limiting spread of already existing rash