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Home / Products / Cementitious Waterproofing Coating

Cementitious Waterproofing Coating

Two-component flexible cementitious slurry for positive and negative-pressure waterproofing of concrete structures.

Two-ComponentNegative PressurePotable Water SafeFlexible
MIX RATIO3:1 powder:liquid
COVERAGE2.0–3.0 kg/m²
CURE (TRAFFIC)24 hours
SHELF LIFE12 months
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↓ Download Datasheet (PDF)

Overview

Works under positive and negative pressure.

Cementitious Waterproofing Coating is a two-component flexible slurry combining a polymer-modified powder with a liquid acrylic emulsion. The cured film bonds chemically to the concrete substrate, sealing capillaries and providing waterproofing that resists both positive (water-side) and negative (back-side) hydrostatic pressure.

Specified for water tanks, basements, lift pits, and wet areas – including potable water and submerged-condition applications.

Key Features

  • Two-component – polymer-modified powder + acrylic liquid
  • Resists positive and negative hydrostatic pressure
  • Potable-water grade variants available
  • Flexible – accommodates fine cracks up to 0.5 mm
  • Excellent bond to concrete, masonry, and screed
  • Vapour-permeable – substrate can breathe

Technical Specs

Technical Specifications

All values measured at 23°C unless noted. Full test data available in the datasheet.

PropertyValueUnit
FormTwo-component (powder + liquid)–
Mix ratio (by weight)3 (powder) : 1 (liquid)–
Mixed density1.65 ± 0.05g/cm³
Pot life at 25°C60–90minutes
Coverage per coat1.0–1.5kg/m²
Total system coverage2.0–3.0kg/m²
Recoat interval4–6hours
Foot-traffic ready24hours
Full cure7days
Crack bridgingUp to 0.5mm
Hydrostatic resistance (positive)Up to 7bar
Hydrostatic resistance (negative)Up to 3bar
Packaging25 kg powder + 8.5 kg liquid–
StandardsEN 1504-2 · NSF 61 (potable)–

Applications

Where this product is used

Five typical site applications where our crews specify this product.

💧

Water tanks

Internal waterproofing of potable and non-potable water tanks.

🏠

Basements

Below-grade waterproofing under positive or negative pressure.

🚿

Bathrooms & wet areas

Under-tile waterproofing for residential and commercial wet areas.

🏊

Swimming pools

Internal pool shell waterproofing prior to tile finishes.

🌉

Retaining walls

Earth-retaining structures requiring back-side waterproofing.

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