Tile grout refers to the material that fills in the gaps between tiles. It is a thick, pasty substance that helps hold the tiles together, securing them in place and preventing them from shifting or separating. Full definition
Use a paste to scrub the sides of the tub to a sparkling white, or mix a solution of one cup borax with one gallon of hot water to eat away at mold in tile grout. (rismedia.com)
The paint and unsanded tile grout mix quickly and this wall was flat and unobstructed so it made for very quick painting. (2beesinapod.com)