Ready mixed gray mortar, based on high strength Portland cement, selected aggregates with uniformed gradation sizes and modified polymers. Distinguished for its strong adhesion, its high resistance to moisture and frost as well as its excellent workability. It ensures unique resistance against impacts and vibrations – whether natural or generated from excavation equipment operating in adjacent spaces. D-31 building mortar is ideal for laying bricks, and cement blocks, for building paving stones and slabs as well as natural stones. Walls built with D-31, both indoors and out, ensure savings compared when with building using traditional materials. That is because D-31 does not require any improving additives to ensure unbreakable bonding.