ARDEX A 826 is a brilliant white, rapid-hardening, gypsum-based plaster designed to create a smooth, ultra-fine finish on interior walls and ceilings, perfect for achieving a true feather-edge finish. It provides an ideal base for paint and wallpaper, with a non-shrink, tension-free formulation that resists cracking even in thin applications. This plaster can be painted within an hour, making it highly efficient for creating a high-quality, smooth surface on a range of substrates, including plasterboard, pre-rendered walls, concrete backgrounds, aerated concrete, lightweight blocks,