Garden Roller – Water Filled Garden Lawn Roller with pressure tested metal roller that can be easily filled with sand or water and has a generous 50cm working width. For successful rolling of your lawn. Weight when filled with sand is 120kg and when filled with water is 72kg. In order to increase germination, newly sown grass and other seeds should always be pressed into the soil. Pressing seeds well down into the soil after sowing makes them safe and secure. Preventing them from being blown away or eaten by birds.