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Acrylic bonding and keying agent.

*Colours may vary from the actual paint and should only serve as visual aide. Always consult in-store before making your final decision.

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Product Description


  • Acrylic bonding and keying agent.
  • Penetrates, bonds and enhance adhesion for long term stability.
  • Improves drying time, flexural, tensile strength and resilience of cementitious and gypsum products.
  • Resists water penetration and movement through cementitious and gypsums substrates.
  • For a water barrier homogenous slurry mix 5L HydroKey, 7.5Kg sieved plaster sand and 2.5Kg Portland cement.
  • As additive to plaster mix, HydroKey may be diluted up to 1:1 with water.
  • Apply undiluted to substrate when used as a keying agent, allow to air dry before application of new plaster or gypsum.
  • Does not solve rising damp problems or waterproofing of high hydrostatic pressures.

Where to use

  • Dry and porous stable cement plaster, concrete, brickwork, fibre-cement and gypsum plaster.

Additional information

Container Size

1 Litre, 5 Litre, 20 Litre