Dulux Acratex Venetian Plaster Quartz Primer is a primer-sealer for interior / exterior use on porous masonry substrates under the Dulux Acratex Venetian Plaster range. Applied by conventional nap roller, a fine aggregate fills masonry pores and minor imperfections providing a sealed anti-slip lightly textured surface which greatly assists the application of subsequent trowel applied Venetian Plaster products.