Roundup Ready To Use Pull & Spray 5 Litre Weedkiller. 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 back.Roundup ALL PURPOSE Pull ‘N Spray 5.0LWeedkillerThe Scotts Company (UK)Roundup ALL PURPOSE Pull ‘N Spray 5.0L