Crack-rock(demolition agent) is a highly expansive mortar to demolish and cut rocks(granite,marble,...) and concretes . crack-rock swell when poured into a Hole and develops a pressure higher than 7500 t/m2 on the hole walls , thereby breaking them open . crack-rock is environmentally friendly because it releases on toxic fumes or harmful substances of any kind . It is non-explosive , therefore supervision of trained personnel is not essential . crack-rock storage requires no special precautions , provided the containers are not tampered with and are kept in a dry place . The product is not sensitive to electrical discharges or currents . www.crack-rock.com