NBS Source
751 Lankolatex


Admixture for key coat preparation, bonding and waterproofing of renders, mortars and concrete. A water-based emulsion of synthetic resin for improving performance of renders, mortars and concrete.


  • Assists adhesion of renders, mortars and concrete even on smooth or wet substrates.
  • Reduces the potential for lime blooming, particularly when bonding onto wet substrates.
  • Waterproofs mortars and improves performance against oils, grease, fuel oil, diluted acids.
  • Assists in the passivation of steel.
  • Lowers modulus of elasticity and improves mortar’s resistance to traction, abrasion and shocks.
  • Enables work to be carried out in permanent contact with water, sea water (with appropriate cement products).
  • Limits shrinkage, micro-cracking and powdering.
  • 0.5 L of 751 Lankolatex to the water content of Parex 30 kg bagged renders for key coat applications and wet masonry sealing.
  • Water based.
  • Pack size: Available in 5 and 20 litre containers.

Suitable for:

  • Key coat additive for hydraulic render, coatings, screeds and low absorption substrates, e.g. lightweight and terracotta blockwork.
  • Cement-based renders.
  • Controlling suction on high absorption substrates such as light weight blocks.
  • Waterproof coatings for tanking, reservoirs, holding tanks and swimming pools.
  • Bonding and waterproofing of plaster coatings.
  • Enhancing new cement screeds that are being bonded to an existing screed without the need for surface preparation.
  • Enhances the screed for laying wall tiles.
  • Suitable for coating, re-profiling or reshaping mortar for patching areas such as damaged corners of concrete.
  • Bonding mortar for repairing concrete (bridging mortar for construction joints).
  • Enhancing the mortar for fixing/ bonding of prefabricated elements.
  • Pointing and filling mortars for voided masonry joints, chimney stacks, or to form a mortar flashing.
  • Repair of concrete floors.


Forms part of other Parex product approvals, e.g. Monorex & Monorex GF. Refer to product data sheets.

General information

Uniclass 2015

Pr_20_31_03_96 Waterproofing mortar admixturesPrimary


M20/130 Cement:sand (air entrained)

M20/160 Proprietary cement gauged render

M20/5 Cement:sand (air entrained)

M22/120 Sprayed

Specification data - Waterproofing mortar admixtures

Product Reference

751 Lankolatex

Standard product features


  • Appearance: Milky white liquid.
  • Solubility: Total in water.