What concentration of muriatic acid should be use for etching old efferescent bricks in our chimney?
We want to seal the bricks on the outside of the chimney, which has developed a white powdery residue on its outside, so are planning on etching with muriatic acid, as purchased from a pool supply place, and are wondering what dilution should we use?
BabyDoll
on September 7th, 2010
10 parts acid and90parts water
God
on September 7th, 2010
we use about a 50/50 mix when we clean mortar off new laid brick but i have never had any luck getting effloressence off brickwork with acid.go online and type in effloressence and see whats recommended…sometimes water and a wire brush will take some of it off…