Knauf

The Rotband universal primer from Knauf ensures an optimal bonding of basic plaster and filler compounds. The primer is necessary because it can crack when drying the filler without primer. The solvent-free primer closes the pores of the mineral substrate. So this can not remove the putty the water so fast. Furthermore, it is open to vapor diffusion, which can regulate the humidity of the room automatically. The red color makes processing much easier as unprocessed surfaces are immediately visible.