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View Full Version : Can the use of Muriatic acid change the color of my Bluestone sitwall?


Matthew211
Sep 3, 2010, 08:59 AM
I'm trying to determine whether it was not mixed properly, left on to long or not rinsed off enough.

ma0641
Sep 3, 2010, 07:31 PM
If the acid was too strong or left on too long, it will whiten the bluestone. It can come from the mortar used. Even though bluestone is a variety of sandstone, impurities, limestone or marble as a metamorphic intrusion will react with muriatic(Hydrochloric) acid.