Smoothing out and preparing a floor for tiling.
Self Levelling Compounds (SLC) are used for smoothing and preparing a floor surface prior to applying a stubborn idea covering such as ceramic, stone, porcelain tiles but after that many adding happening coverings.
The slc is not intended to be used as a unlimited surface to be walked onto as the material will not withstand the wear and tear of foot traffic and can be applied from a feather edge to up to 20 mm thick following the additive of aggregate/granite chippings. Some levelling compounds are sufficient for outdoor use and others for internal by yourself.
For more info bathroom splashbacks.