I recently removed all the tile around by tub & shower area to update it a little. The grout that was previously used seemed like a very good one. Never cracked never had a problem with it. It was there for 8 years now (put in by the builder). When I touch it it felt almost like a rubber grout and it was very white. I like this because I felt confident that it was working properly. I don't know what type of grout this is. I'm afraid if I use the same grout I used when I replaced tile on the bathroom floor it may not work. The floor grout cracks and my tiles are lifting. What is best grout I can buy that will work best in a shower/ tub area.