Durfill is a system for filling machine components with cement-bound casting compound. The dry concrete, simply mixed with water, results in a high strength self-compacting and self-venting casting compound. The material is available in paper bags, as well as bulk goods. Large quantities can be economically transported in silo trucks and placed in intermediate storage. The fresh liquid compound is quickly pumped into the components without generating much dirt and with little direct labor input. Doing so, a performance up to 100 liters per minute is possible.