National Block Filler is a vinyl-acrylic copolymer emulsion based putty, with inert graded filler, developed for filling and leveling the porosity and surface imperfections. It is generalpurpose filler for interior/exterior surfaces and is not recommended for sanding. It provides a leveled surface with excellent adhesion and low volume shrinkage. It will help to reduce topcoat consumptions of the system considerably, on porous surfaces. It contains anti fungal and anti bacterial additives. RECOMMENDED USES National Block Filler can be used as a body filler for interior/exterior surface like hollow concrete blocks, plaster, brickwork etc. It is recommended for leveling and filling the surface imperfections and porosity, so as to get a smooth and leveled surface for subsequent coating system. At normal condition, there is no need of further primer coat over National Block Filler, prior to topcoat. It is always recommended to apply suitable topcoat on block filler.