Spectracide Weed Stop For Lawns Concentrate, 32-Ounce KILLS WEEDS, NOT THE LAWN: Wont harm lawns when used as directed  kills more than 200 types of weeds as listed. CONTROLS ALL MAJOR BROADLEAF WEEDS: Controls dandelion, chickweed and clover (see product label for complete list). KILLS THE ROOT: See overnight results. RAINPROOF: Rainfall or watering 6 hours after application will not wash away effectiveness. COVERAGE: 32 ounce bottle treats up to 16,000 square feet and 40 ounce bottle treats up to 20,000 square feet. Kills over 200 weed types Won't harm lawns Results in hours Kills the weeds, not the lawn 32 Fluid ounce concentrate