Weedkiller gel for weeds in lawn and garden. Roundup Weedkiller is the Worlds best selling herbicide, used in gardens everywhere. Roundup is a weed killer that kills the root of the plant so that weeds never come backRoundup GEL Weedkiller 150mLWeedkillerThe Scotts Company (UK)Roundup GEL Weedkiller 150mL