Ortho Weed-B-Gon MAX with Foaming Action Ready-to-Use - 1/2 Gallon 0397610 64 oz. (1/2 gallon) RTU With LawnGuard formula (will not harm the lawn) Kills dandelion, clover and many other lawn weeds Controls over 200 weeds 100% root kill Results in 24 hours Ideal for spot treating lawn weeds,Rain-proof in 2 hours