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Waterproofing For Windows

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Preparation:

  • All surfaces to be waterproofed must be firm, clean, dry, sound and smooth. All grease, oil, wax, curing compounds, loose material, paint and any other contaminants must be removed, masonry surfaces must be pointed flush and surface defects repaired. New concrete must be cured for minimum 28 days.

  • External corners to be waterproofed must be bevelled to ensure a smooth transition of membrane from vertical to horizontal surfaces.

Installation:

  • Repair all surface defects on masonry surfaces and install a 12 mm bond breaker to all internal corners using Admil SupaSeal PU. Admil SupaSeal PU is a Low Modulus, Hybrid Polyurethane, flexible joint sealant and adhesive that is free of Isocyanates and other hazardous raw materials and omits low odour.

  • Apply WPA 360 or WPA 460 Primer to substrate to be waterproofed. WPA 360 is a water based low solids, fast drying primer for use with WPA 500 or WPA 230 UV waterproofing membranes. WPA 460 is a two component water based epoxy primer used to seal concrete and masonry surfaces.

  • Apply WPA 230 UV membrane, ensuring that the first coat has completely dried before applying second coat. WPA 230 UV is an elastomeric, one part, fibre reinforced, UV stable, water based polyurethane membrane.

  • Allow membrane to fully cure before installing Window.

  • Seal Window using Sikaflex Pro sealant.