SHEETROCK® Brand Ceiling Spray Texture—QT Poly contains polystyrene aggregate that is available in Fine, Medium and Coarse for decorating variety. Produces a handsome simulated acoustical ceiling finish with no acoustical correction. Can be applied over treated noncontact gypsum panel, plaster, and concrete substrates. Dries to a white color that is typically left unpainted on noncontact ceiling surfaces. Not washable unpainted.