worked well and essentially matched the mortar. Dried, cracked, separated from tub and shower around tub and shower (used in two bathrooms) and leaking water. I had to scrub everything out, wipe it down with denatured alcohol and use white silicone to seal the tub and shower instead. Tiles have faded color. I stopped the grout at the edge, taped the painted wall and used this product to get a nice edge at the end of the tile.