For deep textured surfaces, popcorn ceilings, rough fencing and siding. For all paints. Use on stucco, brick, concrete, cinder block, fences, garage floors and basements. For rough surfaces and acoustical ceiling. Slit, resilient foam for deep paint penetration on any rough surface. Foam conforms to rough and extra-rough surfaces. Will not harm the most delicate "blown on" ceiling. Doesnt leave unsightly fuzz, lint or seam marks. Foam conforms to surface irregularities and provides contour coverage. Willnot "mat down". Has a "reservoir action" and carries most of the paint below the surface in thousands of tiny open cells. Less frequent "dipping" and less "spreading out" of paint. Cleans quickly and easily.