Master Seal 521 Grey

Weight: 20KG
LE 220
In stock


  • Name: Sika Seal 521
  • Brand: Sika
  • Type: Waterproofing
  • Material: a two-component, acrylic modified, cementitious coating
  • Size: 20 Kg
  • Technical Data:
  1. Density: Approx. 2000 kg/m³
  2. Positive Pressure: Up to 1.0 Bar
  3. Rate Of Use: 0.75-0.9kg/m²/coat, depending on the substrate roughness. (Minimum 2 coats are required).
  • Application:
  1. To re-face and even out variations in concrete surfaces
  2. As a waterproof coating for water-retaining structures like water tanks, pools, etc.
  3. To provide foundation protection As a backing to marble and granite to prevent water ingress, and thus alleviate surface staining
  4. To provide protection to concrete surfaces from carbonation and chloride attack For use on pedestrian walkways in marine areas
  • Usage:
  1. Remove all grease, oil, dust and residual curing compound, mould release agent or other contaminant that could impair adhesion.
  2. Laitance should preferably be removed by light sweep blasting or hydro jetting.
  3. Mechanical wire brushing may be appropriate for small areas.
  4. Spalled concrete should be cut back to sound concrete and made good with a suitable cementitious repair mortar, such as MasterEmaco 488.
  5. Conventional concrete curing compounds should be removed before application.
  6. The exception to this is when MasterKure 101 has been used.
For more technical information click here

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