USG Sheetrock® Brand Ceiling Spray Texture, QT, are interior finish powder products that mix with water for easy spray application. The medium texture provides a variety of decorating options and helps conceal minor surface defects. The product produces a handsome, simulated acoustical ceiling finish. Can be applied over treated non contact gypsum panels, plaster and concrete substrates. Dries white and is typically left unpainted on non contact ceiling surfaces.