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Norcros Waterproofing Admixture
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Suitable for use in areas with limited movement such as single layer timber floors which will be subject to wetting, without the need for a separate tanking system.


A water based synthetic latex polymer designed to provide a waterproof system when used as a direct replacement for water to mix Norcros Flexible cement-based adhesives.

Features and benefits:

  • For use with Norcros flexible cement-based adhesives.
  • Ideal for use with Norcros Permalayer Anti-fracture Membrane.
  • Suitable for a variety of substrates.
  • For internal and external use.
  • Easy use and application.

General information





Pr_20_31_03_64 Polymer admixturesPrimary


M10/110 Bonded cement:sand levelling screeds

M10/115 Cement:sand levelling screeds

M10/120 Fine concrete levelling screeds

M10/130 Proprietary quick drying levelling screeds

M10/165 Proprietary fibre reinforced levelling screeds

M40/10 Natural stone covering to

M40/110 Tiling to

M40/115 Natural stone covering to

M40/120 Mosaic to

Specification data - Polymer admixtures Enhanced data


All surfaces should be dry, clean and strong enough to support the tiles to be fixed. All traces of dirt, dust laitance and other contaminants must be mechanically removed. Substrates should be true and flat to allow tiles to be fixed without visible lipping of tile edges. This will be particularly appropriate where larger tiles, tiles with rectified edges or mosaics are being installed. Porous or dusty surfaces must be sealed using Norcros Prime Bond diluted 1:4 with water.


Apply the adhesive using the recommended procedure (refer to the adhesive product data sheets), working in manageable areas. When laying Norcros Permalayer Anti Fracture Membrane, apply a 2mm bed of the mixed adhesive to the substrate using a suitably notched trowel.

Lay the Permalayer onto the adhesive bed and roll and press flat until the adhesive appears through the surface, ensuring that no voids remain in the adhesive bed (the use of a roller at this stage is recommended). To ensure that 100% coverage is achieved it is recommended that a skim

coat of the modified adhesive is applied over the Permalayer. Allow to dry before tiles are fixed.


Store in dry interior conditions away from direct sunlight between 5°C and 25°C. The product has a shelf life of 12 months from date of manufacture.


Approx. 5.8 to 6 litres/20kg bag

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