HENRY Floor Leveler 544 Series 12152 Floor Leveler, Gray, 40 lb Bag | Use to level and smooth interior concrete an other surfaces prior to the installation of ceramic tile and other floor coverings. Hardens quickly and can be walked on in 4 hrs, allowing tile to be installed in about 6 to 8 hrs. Covers 40 sq-ft. at 1/8 thickness.