Weeds can take over your outdoor spaces, including your garden or patio areas, if you let them. So, don’t. Control undesirable broadleaf weeds and grasses with Roundup® refill. To use this refill, remove the wand from the empty container of Roundup® Ready-to-Use with Wand Applicator, place it in the Refill for Roundup container, and apply as directed. Let’s you spray continuously so hands stay free from fatigue. After application, this formula acts fast, working its way through the entire plant – killing to the roots! Rainproof in 2 hours. Visible results in 24 hours. Weed takeover averted.