Casting a concrete block or plate is simple. First, the mold is placed on a flat surface, for example a steel plate. Mold oil (release agent) must be applied to the inside of the mold in order to facilitate removal of the block. The concrete is poured gradually in order to ensure a proper filling of the cams. At the same time, the concrete must be vibrated with an electric / pneumatic vibrator for a homogeneous compaction of the concrete. Thereafter, the concrete is smoothed with a trowel. Curing time is dependent on the concrete and the conditions.