Fassa acrylic siloxane top coat. RX 561 is used as protective and decorative coating for exteriors on lime-cement base coat plaster and on walls insulated with the External Thermal Insulation Composite System. CG III(CG = Colour Group) Yield - 1mm grain = 11.4/m2 per tub - 1.5mm grain = 10.4/m2 per tub - 2mm grain = 9.3/m2 per tub (approx.)