MAXDAN

Preparation of the substrate:
State of the substrate: It must be clean of dust, grease, paint residues, plaster and foreign bodies.
Substrate preparation: Loose or poorly adhered particles must be removed, so it is recommended to clean the surface to be treated. Cracks, cracks and roughness shall be filled with MAXDAN, avoiding voids or hollows that may break the bituminous film once it has been formed. If necessary, the surface shall be regularised with a mortar that shall be properly trowelled.
Type of substrate: MAXDAN should not be applied on polished surfaces as adhesion failures may occur.
Substrate moisture: MAXDAN can be applied on dry or damp surfaces, but without water run-off. On very absorbent surfaces or with applications in hot weather and in the sun, it is advisable to water the surface in order to avoid that the water of the emulsion is absorbed or evaporates too quickly, which could favour the formation of cracks in the film.
Drying time: It depends on the ambient temperature, sunshine and relative humidity.
Recommended minimum waiting time between coats: Wait about 24 hours.
Application tools: It can be applied by brush, brush or roller.
Minimum application temperature: MAXDAN should not be installed when the temperature is below + 5 ºC.

• Priming and preparation of porous surfaces where a bituminous sheet is to be subsequently welded. Apply a coat of MAXDAN, diluted with water in a proportion of approximately 10-20%, making sure that the pores are well impregnated. The approximate yield will be 0.3-0.5 kg/m2. In adhered systems, the bituminous sheet is welded in its entirety, so the entire surface must be primed. In non-bonded or floating systems, the bituminous sheet is only welded in the singular points (parapets, drains, expansion joints, etc…), and these elements must be primed.
  
• Restoration of old self-protected bituminous waterproofing with slate or mineral granules. Once the self-protected sheet has been swept and cleaned, MAXDAN shall be applied as described in the previous section. Subsequently, the new bituminous waterproofing system shall be applied. In adhered systems, the bituminous sheet is welded in its entirety, so the entire surface must be primed. In non-bonded or floating systems, the bituminous sheet is only welded at the singular points (parapets, drains, expansion joints, etc.), and these elements must be primed.
  
• Priming and preparation of porous surfaces that are subsequently to be waterproofed or treated with asphalt products. Apply a coat of MAXDAN, diluted with water in a proportion of approximately 10-20%, making sure that the pores are well impregnated. The approximate yield will be 0.3-0.5 Kg/m2.
  
• Protection against humidity of the external surface of concrete retaining walls and buried foundations. A first coat of primer is applied with MAXDAN (see application as a primer coat). Subsequently, at least two more coats must be applied, crosswise, also with MAXDAN. The approximate coverage of each coat is 0.5 kg/m2. Before applying one coat, check that the previous one is completely dry.
  
• Protection against damp in walls and party walls. Proceed as described in the previous section.
  
• Making asphalt mortars for screeding on waterproofing. As a guideline, the proportions of the materials are 2 parts by volume of MAXDAN, 4 parts of river sand, 1 part of cement and the necessary water to achieve the desired consistency.