This Venetian Plaster primer is unlike other quartz primers as it serves as a primer and permanent binder in one. This product contains special polymers that ensure your plaster is as safely bonded to your walls, ceilings and doors as is possible. We also incorporate a fine marble powder to act as a tooth that helps create an easy surface to trowel on and accepts and holds the plaster grains in place. Quartz primer is a low odor, zero VOC copolymer based primer specifically designed as a preliminary binder coat before lime and cement based plasters only for interiors. It can be applied on new drywall, water based paint, cement, wood and more. For walls and ceilings only. Not suitable for waterproofing or stain-blocking.