Stone Quest - Intensive Cleaner, Quart

We had algae on our flagstone on our patio and it did not remove it or make the stone look much better. I would not recommend it.

Excellent on slate.

I used this to clean neglected tile and grout, and it worked very well. Gave the tiles a nice sheen too. To clean the grout, I also used a McCullough steam cleaner (bought from Amazon) and lots of elbow grease with a grout brush. Will use the Stone Quest grout sealer next.

The list price on this is about $15. So be sure to shop around. A low price for this would start at about $11.50.