Ardex Feather Finish XF joins Ardex Feather Finish and the rest of Ardex's full line of patching compounds designed to help eliminate flooring installation problems associated with disbonding, crumbling, mold, mildew, and staining. Like classic Ardex Feather Finish, Ardex Feather Finish XF is a self-drying, finishing underlayment, designed to provide a smooth surface prior to the installation of floor covering over a variety of substrates. It installs from a true feather-edge, up to unlimited depth in defined areas and can receive floor coverings in as little as 15 minutes. Also suitable for castor wheels, Ardex Feather Finish XF is mold and mildew resistant.