NuGrout Cleaner and Pretreat is a potent phosphoric acid-based concentrated cleaner used to remove dirt, soap scum, rust stains and mildew from ceramic tile grout. The product also lightly etches grout to prepare an ideal bonding surface for NuGrout Colorant and Sealer.
The product will typically cover approximately 10 – 35 sq ft per oz (300 – 1000 cm2 per mL) at full strength. Amount needed may vary greatly depending on the condition of the grout.