At a distance, polyconcrete resembles regular cement. Microscopic inspection, however, shows that the substance is composed of microscopic, fibrous with deactivated nanites scattered throughout it. When the nanites are activated (usually by a secure signal unique to a given site or location), they disentangle the fibres of the polyconcrete, causing it to revert to a semi-liquid state, enabling it to be easily removed, repair of moulded into new shapes. Any given volume of polyconcrete has a node embedded in an exposed (or at least accessible) surface that receives the signal for the substance to change its properties.
The reusability and flexibility of polyconcrete has made it an exceptionally common building material. The flipside of this is that a widespread method of property destruction and/or infiltration is the acquisition of the state-change signal and the subsequent dissolution of a given polyconcrete slab.