Self-leveling concrete, also known as self-draining, self-smoothing, or self-compacting concrete, is a special fluid mixture of cement, fine aggregate, water, and admixtures that is self-leveling. It flows easily to level itself and fill uneven or irregular surfaces without the need for mechanical vibration, screeding, or trowelling. This allows it to reach a flat and level finish reg... https://timessquarereporter.com/others/self-leveling-concrete--an-introduction-to-this-innovative-building-material