A local hardware store has poison ivy soap. I keep a bar in my bathroom, truck and my trailer. Sometimes I wash up with the customers garden hose before leaving their place. I think that it is a lie based soap, but it works great even after some blisters show up the next day after exposure. Good stuff!!! As I also do tree and brush cutting, I keep a stock of new work gloves and long sleeve shirts in my trailer and if I know that I have contaminated a pair of work gloves, they get trashed.