Deadfast Weedkiller will kill most living plant tissue on paths, drives and wasteland. It can be applied straight from the sachet to clear well established woody weeds and trees, or diluted down to eradicate large areas of weeds and plants. The active ingredient works through systemic action as it is carried thoughout the plant by sap. After absorption through foilage or cut stumps, the Ammonium Salt of Glyphosate is carried to the outer extremities of the plant’s root system where it beings to work. Effects should be visible in 7-14 days.