The best cleaner to use for removing grout residue from a granite floor is sulfamic acid. Sulfamic acid is sold as a grout cleaner and works well on granite surfaces. Do not use on marble or limestone since the acid will etch these surfaces. Sulfamic acid can be found at tile supply stores, home centers and from marble equipment suppliers.
TIP There are also non-acidic grout film removers available that work effectively on both granite and marble surfaces. Check the resource directory for further information on these products.
Article ID: 532
Created: January 20, 2022
Last Updated: January 20, 2022
Author: Pam Freitag
Online URL: https://sr-manual.com/kb/article/i-have-a-customer-with-a-granite-floor-that-has-just-been-installed-and-the-installer-left-a-grout-film-all-over-the-surface-what-can-i-use-to-remove-this-film-532.html