ProSpec Feather Edge is a trowelable, rapid setting underlayment for flash patching and skim coating over a wide range of interior subfloors including concrete, wood, terrazzo and ceramic tile.  Apply it from feather edge to ½” for quick repair of cracks, gouges, dings or ridges prior to the installation of floor covering.  ProSpec Feather Edge requires no priming and is polymer modified for exceptional bond, according to the company.  Feather Edge also features Micro Defense for added protection against mold and mildew.