Also.. should I change it and have him use the stuff you mix? It seems like everything I read says premixed stuff is trouble. But he says he likes it. I don't know what to do. He is laying the tiles tomorrow night and will be back on Wednesday to grout.. so I need to figure out what we are doing.
It is the TEC ready to use premixed grout from menards. What do you all think? Please give me some advice on what we should do. Should we have him take it back and do the regular kind that you mix? And seal it?