Unsanded grout does not contain sand, but instead additives are added into it. They are best for thinner grout lines of width 1.5 mm to 3.0 mm. It is also easy to apply unsanded grout in wall tiles as it is in a relatively solid form as compared to sanded grout.Sep 27, 2018 · The grout to water ratio is typically 1:1. Always check the manufacturer's directions for the grout mix you have chosen to use. Tilt the bucket at a 45-degree angle and slowly add the water in a trickle, mixing as you go. If it is too thick, it could be that the grout hasn't been thoroughly mixed with the water you've already added.