MARMOCRET Fine is a pre-mixed render (skim coat) with fine-grained aggregate (up to 1.3 mm) that only requires the addition of water. MARMOCRET Fine offers:
- Total water repellency, according to DIN 18550.
- Excellent vapor permeability (breathing ability).
- Stable standardized properties.
- Suitable for indoor and outdoor application.
- Crack prevention unlike ordinary cement-lime renders.
- Simplified application on site (needs only water).
MARMOCRET Fine is used as the finish coat of rendering work, to create a white, water-repellent final smooth surface. It usually replaces the final render coat.
Substrate preparation
The substrate must be free of dust, oily or loose materials etc. and should be thoroughly dampened, before the application of MARMOCRET Fine. If a rendering coat has been applied first, it has to possess a compressive strength equal to or higher than the one of MARMOCRET Fine, according to the general principle dictating that every preceding layer should e stronger than the next one. In case of colored (other than white) render application, it is recommended to primer the surface with PL-PRIMER, which reduces the absorptivity of the substrate, ensuring a uniform surface color. The substrate may be a rendering coat, or even a concrete or masonry surface.
Application
MARMOCRET Fine is added into clean water under continuous stirring, until a mortar of the required workability is formed. The mixer to be used should be clean, to avoid any alteration of the render’s color. The render is applied by hand, using a float, trowel or rendering machine. Therender is then smoothed by hand, using a sponge float, after it has sufficiently set. Working time depends on the substrate absorptivity, ambient temperature and workability of the mixture.
