Hi Randall,
Thanks for your reply. I'm thinking of using QuartzLock2 Grout by StarQuartz (
http://www.starquartz.com/grout.html), which is the 2nd generation of quartz-based urethane grout. Yes, I've done a google search on this product, but have not been able to find any user reviews. I have heard that urethane grout requires a long cure time, so there may be installation error if one doesn't wait long enough. Anyway, I only have the manufacture's claims that it is a great pre-mixed urethane grout product that's easy to use, doesn't require sealing, and has "unmatched stain resistance, ultimate color consistency, crack resistant flexibility, mold/mildew protection and UV stability." Sounds perfect for use in a tile + glass block shower, but I would like to hear some
actual success stories with this grout. Anyone?
Eliza