I just finished my first attempt at grouting a few hours ago. I removed and replaced the grout in between the last row of tiles and the tub in the buddy bath of my 5 year old house. The grout looked great immediately after I finished but after an hour or two it seemed to shrink in a few spots creating cracks. I followed the instructions on the bag verbatim. I know I still have to caulk over the grout, which should hide the cracks but I am obviously worried about water seeping thru.
Thanks in advance,