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• Features & Benefits
• Preparation & Application
• Limitations

Features & Benefits

• Liquid admixture made from acrylic polymers (with no formaldehyde) developed in the MAPEI Research & Development laboratories
• When added at a rate of 1-1.5% in weight of the cement to a conventional screed mix (aggregates - cement - water), it improves plasticity and workability, reduces porosity and hygrometric shrinkage, accelerates the development of mechanical strength, improves thermal conductivity and reduces drying times
• Very easy to use which makes it ideal for mixing screed using mechanical-computerised mixers, such as modern fixed silos or silos on trucks

Preparation & Application

• Any type of substrate is suitable for sand-cement screed mortar containing Mapescreed 704
• To reduce the risk of rising damp, we recommend isolating the screed with sheets of polyethylene or similar material
• If there is a high level of moisture, integrate the isolating system with a waterproof membrane
• Existing cementitious, stone and ceramic substrates must be strong, dry and free of cracks and must have no oil stains or traces of wax, paint or gypsum
• Blend the cement, aggregates (0/6), water and Mapescreed 704 mix together in a mixer for around two minutes
• The mix must be applied and floated as soon as possible after mixing and within an hour from the start of preparation
• Special care must be taken on the amount of mixing water added. The mix must have a screed mortar consistency that, when tamped, becomes compact with a smooth, cohesive surface with no bleeding
• Screed mortar may be mixed with the following:
  • Planetary mixer
  • Standard site mixer
  • Worm-screw mixer
  • Mixer truck
  • Automatic pressure pump
  • We advise against mixing by hand; this method does not guarantee that the Mapescreed 704 is evenly dispersed throughout the mix and more water could be required to obtain the consistency required
• Before laying flooring sensitive to moisture, check the level of residual moisture in the screed with an electric or calcium carbide hygrometer
• Consumption: 1-1.5 kg every 100 kg of cement

Limitations

• Do not add Mapescreed 704 to lime or gypsum-based mortar
• Do not add to special hydraulic binders such as Mapecem or Topcem
• Protect screeds from air currents direct sunlight, freezing weather, rain, etc. for the first 24-48 hours after laying
• Protect Mapescreed 704 from frost