Amazon.com: Ultimate Grout Cleaner for Tile Floors Blasts Away Years of Dirt and Grime. Heavy Duty Spray Cleaning Solution Produces Amazing results, and it is Safe for Colored Grout and Natural Stone. (
Custom Building Products TileLab 32 oz. Grout and Tile Cleaner and Resealer TLOSRAQT - The Home Depot
I laid some black mosaic tiles and used a charcoal grout. We wanted the grout darker so we tried to use Dunlop grout paint and it refuses to stick to the grout.
Bathroom Cleaner - Green Dolphin Tub, Tile & Grout Cleaner GD-TTGC – Hansler Smith