Product details:

Hi-Yield Killzall Extended Control kills and prevents listed weeds and grasses for 3 to 6 months. Apply to both established grassy and broadleaf weeds and weed-prone areas where weeds have not yet emerged. Apply only where no vegetation is desired. Visible effects occur within 3 to 5 days with complete kill in 2 to 4 weeks. Dual action formula for spot treat driveways, sidewalks, along fences, curbs, etc.