Got all of the grout done today, I am now a big fan of Prism grout. It is totally predictable and let's you know when it is ready for sponging - IF you understand its timeline - all in my opinion.
True 1/8" grout lines, which mine are not, based on wavy tile edges/surfaces, will need some quick attention as prism sets up fast in small quantities. But, as a general rule for DIY'ers who don't use Prism all the time, just pay attention to how firm the grout has set up and attack the grout lines to smooth them out before they harden, but don't worry too much about the haze as it is still removable after the grout lines set. (I had glossy tiles in this job so I guess YMMV)
You will find a point, in my experience, where the grout between tiles, pebbles in this case, is set. Then you can remove the haze with a clean, very dry sponge and a very light touch with no problem.
Hope this helps someone!
|