A local tile store mentioned a product called AntiHydro too. It's supposed to penetrate and strengthen without changing the color. That said, he recommended a product called Custom Thinset Mortar Additive, which he said Home Depot carries. He said if you use a drill mixer to use it at a low speed, or better yet just mix by hand. Another thing that I learned from the Prism representative (who was very helpful, concerned and professional) is that you don't want to mix grout with a drill mixer on high speed. Since I had read all about the dangers of too much water- during mixing and cleanup, I felt I was really careful to avoid that, but as that is (I'm told) the most common problem it's possible I didn't avoid it enough. It is in similar condition to a few days ago: hard to the touch, but if dampened, left for a moment, then wiped again with a damp sponge it seems to soften and I get some slight smearing, and it's easier to scratch with a fingernail. I thought I should post a follow up for the benefit of anyone researching prism grout on this site. We were going to use Prism alabaster- any recommendations? This problem would be even more terrible around the tub/shower.
We are about to start our walls and I am thinking perhaps I shouldn't use Prism grout, since I don't even know what I did wrong. I really, really, really, hope we can salvage this floor. Between the 1" hex and this being our only bathroom, and the fact that we are ending our second month of living with a porta potty in the driveway. Will this be any better after sealing? Is there anything else I can do to help it to cure harder? I can't imagine trying to re-grout this floor.
The grout was made in 2009 according to its sticker on the bottom, which says 0908501C. Was careful to clean with a well wrung sponge. I mixed with cold water until thick, slaked, mixed, applied. And I have weak fingernails! That by the way is from a different bag- the one intended for our walls, not the one I used on our floor. However, I went and dug up a test board I made, where I mixed a small amount by hand in a little bowl and tiled some spare hex's, and sure enough, I can scratch that out even when it's dry.
Today during some cleanup I noticed the gray seemed to be smearing slightly, which led me to discover it can be scratched with my fingernail.Īfter some research I thought perhaps my problem was over-mixing with a drill- the grout DID seem thick- but sort of lighter than peanut butter- like a whipped peanut butter- (since prism advertises being lighter than other grouts anyway I didn't worry much about it). It looked beautiful and seemed to dry nicely. 4 days ago we grouted our new 1" hex bathroom floor with oyster gray Prism grout.
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