National PVA Primer Sealer for Masonry is a special PVA based emulsion sealer clear with excellent penetration and sealing property on cementitious surfaces. It has excellent adhesion and moderate alkali resistance to the surfaces. It is a general purpose primer sealer for masonry works. It is suitable for interior/exterior applications. It contains anti fungal and anti bacterial additives. RECOMMENDED USES National PVA Primer Sealer for Masonry is a general-purpose primer clear for cementitious surface. Since it has excellent penetration and sealing properties, it is suitable for the application on more porous and a little chalky type surfaces. It is used for the interior/exterior applications on concrete, plaster, asbestos, gypsum, brickwork etc.