An acid for the removal of lime and cement laitance. It removes efflorescence and calcareous sinter, dissolves mortar remains, lime and boiler scale. During the acting time, it forms easily soluble compounds which can be rinsed away with water. To be used for all kinds of fair-faced masonry work, interior and exterior, especially clinker, hard-burned brick, one-quarter brick and facing masonry work. Removes boiler scale!