AI: 21.3% Carfentrazone-ethyl. Fast-acting. Customers can be so impatient. They want dead weeds now. Add QuickSilver herbicide to every post-emergent herbicide tank mix and your customers will see the results they want in 24 hours. QuickSilver increases the speed of kill and expands the spectrum of control of mature, perennial broadleaf weeds. Easy on grass, environmentally sensitive, flexible application, and rainfast with low residue.