Roundup Dual Action Weed & Grass Killer + 4 Month Preventer 1.25 GAL Refill. Dual Action formula kills existing weeds &prevents landscape and hardscape weeds from growing. Spray directly to kill weeds and grass down to the roots. Spray inweed prone areas to create an invisible weed barrier for up to 4 months. Use in driveways, sidewalks, and patios; alongfences, foundations, curbs, retaining walls, and edge lawns; as well as on decorative rock or gravel areas.
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