Substrate type
Walls of brick, ceramic and silicate blocks, cellular concrete blocks, walls and ceilings of concrete or prefabricated concrete components. Old, not weathered cement-lime plaster.
Substrate preparation
The surface must be clean, sound, dry and free from dust and greasy spots. Patch any defects and irregularities with ALPOL AG T29 gypsum plaster applied by hand no later than an hour before plastering. Surfaces exposed to scratching, e.g. adjacent structural material, hole corners etc., should be strengthened with 10 mm fibre-glass reinforcing mesh, embedded in the gypsum plaster. Strengthen loose surfaces with ALPOL AG 700 deep-penetrating primer. At least 24 hours prior to the application, prime concrete surfaces with ALPOL AG 702, and highly absorbing surfaces with ALPOL AG 703. Protect all steel components (frames, conduits, barriers etc.) from direct contact with gypsum, due to its corrosive action.