Dingo Fast Set Hi-Strength Concrete is perfect for structural jobs big and small that require a fast set time without compromising on strength. The fast set easy to use formulation is suitable for both professionals and do-it-yourself jobs around the home. Coverage and water: 8 Bags of Dingo Fast Set High Strength Concrete Mix will make approximately 1.5 square meters of concrete at a depth of 50mm. Approximately 2.3 litres of water to a 20kg bag.