New chemistry that's especially effective on over 200 hard to kill weeds, right to the roots. Visible results in just 24 hours. Rain fast once dry. Reseed in just 2 weeks. Superior cool weather performance down to 45 degrees Fahrenheit extends application window to early spring and to late fall when weeds are most susceptible. Non 2,4-D formula contains MCPA, Mecoprop-p, Dicamba and Carfentrazone.