I have mosaiced part of a wood birdhouse with tiles using GE Silicone and didn't need to grout. I'd like to do another one and grout it also. What do I use for the grout?
wood is not optional but is ok for just an indoor decoration. Unsanded grout is for pieces that have grout lines less than 1/8th inch and has alot of shrinkage and cracking issues on larger grout lines. Sanded grout is most common for mosaics and will be stronger.
I use sanded grout for everything.