All-In-One Lawn Weed & Crabgrass Killer kills lawn weeds plus crabgrass in one easy step. Kills dandelion, clover, chickweed and more and will not harm your lawn when used as directed. Rainproof in one hour. Kills 200 weeds. Ready-to-Use formulas contain SmartTrack, a non-staining marker that indicates where you’ve sprayed. Active ingredients concentrate: 4.85% 2,4-D, dimethylamine salt ; 1.61% quinclorac, 0.45% dicamba, dimethylamine salt. Active ingredients Ready to Use: 0.313% 2,4-D, dimethylamine salt ; 0.104% quinclorac, 0.029% dicamba, dimethylamine salt.