I have to repair an area that's tiled above the shower/bathtub. The adhesive/grout that I'm using is pre-mixed and the choices are sanded or unsanded. It's the first time I've worked with this stuff and I don't know what the difference is between the two but suspect it has something to do with the finish of the grout? Thanks. Shellback
Unsanded grout is white portland cement (plus pigment if colored, possibly polymer fortifiers), which shrinks when curing, and will thus crack in joints wider than about 1/16" or so.
Sanded has fine sand aggregate, which minimizes shrinking. Also slightly rougher texture and a bit different to finish.
The package instructions should instruct you which to use for your application.
Thanks! Shellback
*Please REMOVE the obvious for my correct email address*Have something to add? Share your thoughts — no account required.
Ask the community — no account required