Wall Spray is a trowelable and/or hopper gun / compressed air applied cementitious coating for texturing both interior and exterior surfaces. Typical areas include retention walls, entry/accent walls, columns, gable ends, fireplace accents, and any other vertical surface or wall. Wall Spray is formulated to provide excellent bonding to new as well as existing concrete, concrete block, foam, drywall, plaster, and even painted surfaces.