Dual-action formula kills weeds to the root and pre-treats weed prone areas such as driveways and sidewalks. Also ideal for use around patios, fences, foundations, curbs, retaining walls, and lawn edge. Rainproof in 10 minutes. Visible results in 3 hours. Prevents weeds from emerging for up to 4 months. Active ingredients: 1% Glyphosate, 2% Pelargonic acid and related fatty acid, 0.017% Imazapic. Ready to use.