Fassa universal pigmented primer undercoat. FX 526 is used as primer undercoat-filler, especially formulated for aqueous coatings in dispersion such as RSR 421, RX 561, whether synthetic, mineral or siloxane. Thanks to its covering power it creates a uniform, coloured surface; at the same time, the fine aggregate ensures better adhesion of thick finish coatings both on the External Thermal Insulation Composite System and on already painted surfaces. Yield - 90m/2 per tub (approx)