Grout Dried too dark
I cut out and replaced about 3 feet of cracked sanded grout using the same exact grout and color originally used. However, after 4 days, it dried much darker than the original. (dark beige instead of a sort of antique white) The Custom Building Products technical support says it is because the substrate was too dry, causing the grout to dry to fast, and the only solution is to cut it out and re-do it. Is this a valid explanation?
Since the tile is a very dense porcelain, I did not bother to mist it with water. Also a couple of years ago, I did a smaller repair of about 8-10 inches the same way and it turned out fine. I use Polyblend color 382 (bone) sanded grout.
Thanks for any suggestions. I hate to have to cut it out again.