Acid burn can cause discoloration and severe etching. While the discoloration may be reduced, the etching cannot be reversed. Please see product data sheets for specific application instructions and recommended dilution rates. Always test in a small, representative and inconspicuous area before installing the product on the entire substrate or stain.

To remove acid burn discoloration...

From brick: The first and mildest option we recommend testing is 800 Stain Remover. The second-mildest option we recommend testing is Ferrous Stain Remover. 

From concrete/block: The first and mildest option we recommend testing is Light Duty Concrete Cleaner. The second-mildest option we recommend testing is Custom Masonry Cleaner. The strongest option we recommend testing is Heavy Duty Concrete Cleaner (if you have standard gray concrete). 

From granite (unpolished only): The first and mildest option we recommend testing is 800 Stain Remover. The second-mildest option we recommend testing is Ferrous Stain Remover. 

From limestone: The first and mildest option we recommend testing is Light Duty Concrete Cleaner. The second-mildest option we recommend testing is Vana Trol. The strongest option we recommend testing is Light Duty Restoration Cleaner. 

To be sure, always call us to make sure you're getting the right product for your substrate and conditions. 

We're here to help at 1-800-255-4255.