Terrible product. We applied this twice (with two ours in between applications) on the grout in the shower. It has only been two months and the grout has already started soaking water and getting dirty!!!! Now we cannot return the product. And interestingly but surprisingly, the manufacture's 20 year guarantee clearly stated that their guarantee excludes any issue related to grout. However, in their description they promote it as good sealer for grout. False advertisement. Buyers beware!!!!

We just bought a house with a new full tile shower in the master bath. I've sold shower enclosures and know that these tile floors leak like crazy after a few months if they are not treated. The water seeps through the grout into the subfloor. I called the installer and he recommended the 511. He said the biggest problem is people not using enough of it in the initial application - second biggest problem is not applying a follow up application 3-5 months after the first. Installer said a pint would be more than enough and he was right! I had the whole shower floor and bottom 2 feet of wall tile done in 3 minutes - waited 4 minutes and wiped the excess off with a couple terry cloths.
After the recommended 3 day curing time I took a shower and was impressed that the water beads up! There was no discoloration to my white porcelain tile or the grout. I'm happy with the results and think this should help protect my subfloor from leaks (A good installer lays a barrier beneath the tile, but I wanted to protect as much as possible so I went with the Miracle Sealant 511).

Good Luck

I have used this on my kitchen counter and bathroom. I think the coating works maybe 3 months or so then it no longer repel water. I thought it's supposed to be 1 year?

This sealant is the best we have found. Water does not make it through. Only issue is it is very dangerous chemical. Wear good eye and hand protection and try not to breathe in fumes. You can smell the strength of this stuff. We have bought other sealants, and they do not perform anywhere near this product. You will not be disappointed. ONE WORD of CAUTION.... the measurement coverage. We bought it thinking it would cover 1000sq ft of grout, however on the inner chart that came with it, it was only 200sq ft for grout 1000 sq ft was for non-porous tile. So we needed more. Check out coverage details by material before buying to estimate quantity. I did not do that.

I've tried other products to enhance the look of our granite and they only worked a bit for a short while. A tech from a granite repair company told me about this, and it really works well.