No problem. I used the Grout Refresh on a new install because the grout dried lighter than expected and varied a fair amount. The Grout Refresh, while an extra step, made the final product look amazing (color was what we wanted it to be and it was 100% consistent throughout the room).

If you’re really precise or “anal retentive” this type of product really helps you dial in the color if the grout application or cleaning effort comes out more varied than you’d like.