Mark your low spots with a level and use the self levelling mix.
Tiling wall fill low splots with thinset.
This should be be done if you want to put a mosaic insert of thin glass tile 1 8 inch between thicker architectural tiles like 3 8 inch stone and ceramic and still have a flush surface.
Is it ok to use thinset to adjust the slope and fill low spots even if it means skimming the entire surface to make adjustments.
Need to make some adjustments in the shower pan pitch where i have flat spots and or low spots or the pitch is slightly off.
Deep screed thinset over them to create a flat surface.
This will drive the tiles deeper into the mortar.
Fill in the unbowed areas of the wall to bring them in line with the bow by floating extra thinset made extra sticky with the addition of an additive such as latex.
Because it is cementitious thinset is dimensionally stable it will not shrink or contract.
How to use a thinset for leveling.
Using thinset to fill in low spots.
You may want to tape several strings down criss.
Tape a string down from one high point in the floor to another high point in the floor.
Thinset is also heatproof so it will not lose its grip in hot environments.
If you find low spots more than 1 4 in.
Mix it very thin and runny so when you pour it it will run to the low spots.
This technique works best for.
You just mix the powder with water and pour to create a flat smooth surface.
Thinset tile mortar provides a very strong bond and is resistant to moisture and mold growth.
Low areas on a surface can be built up with thinset mortar mixed with an additional aggregate of very coarse sand a few days before tile is laid.
For really bad floors self leveling compound also called self leveling underlayment is a lifesaver.
Mix the combination until it has the consistency of peanut.
Pour thinset powder into a bucket and add water.