A worker applies the primer to the concrete floor with a roller. Applying a primer to the floor. Floor priming. worker brush primer grout of stones Stock Photo - Alamy
Grout Line Touch-Up Roller, Touch-Up, 1/4 In. Round-End
How to Grout Tile With These Simple Steps - Atlas Marble & Tile
HDX 12 oz. Grout Sealer Applicator Roller Bottle 10279X - The Home Depot