Kills weeds and prevents new weeds for up to 12 months Advanced concentrate formulation – new liquid concentrate formulation that is more concentrated and easy to dose and mix 7 day visible symptoms. Rainproof after 12 hours The Yates pathweeder range is a total weed control solution for paths and driveways. This advanced formula is a combination of a systemic herbicide to kill existing weeds and a long lasting herbicide that prevents new weeds germinating for up to 12 months.