Our special cement mixture successfully seals rebar rust problems without having to cut out the rebar steel. Gray concrete color. Acrylic modified materials.. Color - GrayWarningContains cement and alkaline substance irritating to eyes and skin. Should product contact eyes flush them immediately and repeatedly with water and call a physician. do not take internally. In case of skin contact rinse immediately with water. Use of rubber gloves is recommended. Keep out of the reach of children.