National Spray Plaster Medium is a ready to use material, based on a single component acrylic copolymer binder and modified with precisely graded inert aggregate filler and additives. It is an internal ready mixed plaster for interior applications over spray plaster coarse or directly on concrete, brickworks, masonry surfaces etc. This is mostly used for leveling surface imperfections for hollow concrete blocks. It contains anti fungal and anti bacterial additives. RECOMMENDED USES National Spray Plaster Medium is recommended for internal applications to infill the surface imperfections and voids or to render large sections of concrete, brickwork or masonry by spray application. It can be applied as a base coat on location ground floor, basement or any upper deck of car park concrete walls and ceilings. It can be used up to 5mm thickness per coat to fill the voids or to level the surface imperfections. Always recommended as an under coat plaster.