Roundup� Fast Action Ready To Use Total Weedkiller 1.2L (1ltr+ 20% free) Results in 48 hours. Naturally breaks down in soil. Perfect for paths, drives, patios and flower beds. Roundup� Total Weedkiller is a systemic weedkiller, killing the root so weeds don�t come back. Degraded in soil by micro organisms leaving no residue, meaning you can start replanting in just 7 days. The fast acting formula means results are visible in 1-2 days. With an easy-grip, child resistant trigger, this 3 litre pack is ideal for treating larger areas. .