Size: 40 lbs.Use To Level And Smooth Interior Concrete And Other Surfaces Prior To The Installation Of Ceramic Tile And Other Floor CoveringsAdheres To Wood, Concrete, Concrete Backer Boards, Masonry And TerrazzoHardens Quickly And Can Be Walked On In 4 Hours, Allowing Tile To Be Installed In About 6 To 8 HoursCovers 4 Sq. Ft. At 1/8" Thickness***AVAILABLE FOR LOCAL PICKUP ONLY***