DAP Bondex Concrete Floor Leveler, Gray, 5 Lbs.General purpose Portland cement based floor leveling product for concrete, masonry, and wood subfloors. Ideal for patios, sidewalks, garages, and for preparing surfaces prior to the installation of finished flooring products such as tile, wood, vinyl sheet goods, carpeting, or vinyl floor tile. This product must be mixed with DAP Bonding Liquid & Floor Leveler Additive. Interior or exterior use. Color: Gray. Set time 3 to four hours. 24 hours before