Roundup® Dual Action Weed & Grass Killer Plus 4 Month Preventer Concentrate

This concentrate kills existing weeds and grass and prevents new growth for up to 4 months. It is rainproof in 30 minutes and effective within 6 hours.

• The description claims this product kills weeds and grass down to the root and creates an invisible barrier in the soil.
• The description claims it is rainproof in 30 minutes and effective within 6 hours.