National Shield Exterior Filler is a 100% pure Acrylic based homogenous putty, with specially graded fillers and additives, for filling the porosity and leveling the surface imperfections on exterior concrete and hollow blocks. It provides a uniform smooth and leveled surface. National Shield Exterior Filler offers, maximum gloss and performances to topcoat. It contains anti fungal and anti bacterial additives. RECOMMENDED USES National Shield Exterior Filler can be used as a body filler for exterior applications on concrete surface, hollow concrete blocks, plaster surfaces etc. It is recommended for leveling and filling of surface imperfection and porosity so as to get a smooth leveled surface for the subsequent topcoats applications. No primer is needed on the filler prior to topcoat. It is always recommended to apply suitable topcoat on National Shield Exterior Filler.