FiberWall is an alkali-resistant, fiberglass-reinforced, Portland cement-base surface bonding cement with sand, used for construction of concrete block walls by dry-stack (without mortar). It is also ideal to waterproof, strengthen, rehabilitate, reinforce, restore and beautify various existing deteriorating surfaces, including chimneys, retaining walls and other concrete, brick, stone, tile or stucco areas above and below grade, on the interior and exterior.Coat new block walls dry-stacked (without mortar)Waterproof, restore and beautify existing wallsHigh-strength, resists crackingSafe for potable water cisternsFor new or existing masonry