So I did a house wash on Friday that invloved some front steps which needed some nmd80 to remove slight stains from the morter that was recently patched up. The bricks were not new. I did the house wash which ran down the middle of the driveway (which was across the whole front of the house) and then I treated with nmd80 and cleaned the driveway right after. The nmd 80 was not allowed to dry on the driveway. The driveway was poured last year, but I only used about 1000 psi on it and moved as quick as I could as it was pretty clean. The owner texted me today and told me there is a slight stain in the driveway that looks like the brick color where the runoff went. I did notice what was likely this stain while cleaning, but wasnt sure as it was slight. Could it be the brick, which is red, or somehow could the nmd 80/sh have affected it somehow? I did pretreat the driveway when I cleaned it and it didn’t touch the stain. Any thoughts on how I can get this up? Pic to follow later today.
Edit-I searched for nmd80 stains and couldn’t find where someone else had this problem.