Name: Crystalline Waterproofing Additive CWA-100
Brand: Coatingsink
SKU: crystalline-waterproofing-additive
Availability: InStock

Question 1

How does integral crystalline waterproofing differ from surface-applied membrane systems?

Accepted Answer

Unlike sheet or liquid-applied membranes, CWA-100 is added directly to the concrete or mortar mix. Its active chemicals react with free calcium hydroxide and moisture throughout the cementitious matrix to precipitate insoluble calcium silicate hydrate crystals that fill capillary pores and micro-cracks across the full cross-section, providing protection even under reverse hydrostatic pressure where surface membranes would debond.

Question 2

At what dosage and mixing stage should CWA-100 be introduced?

Accepted Answer

Standard dosage is 5–10 kg per m³ of fresh concrete, replacing an equal mass of cement in the mix design. Introduce CWA-100 with the dry aggregates before water addition to ensure homogeneous distribution. For demanding applications such as tunnels, water-retaining structures, or below-grade basements, dosage may be increased to 12 kg/m³; beyond this threshold, strength gain should be verified against the specific mix design.

Question 3

Is CWA-100 suitable for potable water contact structures?

Accepted Answer

CWA-100 contains no chloride-bearing compounds (Cl⁻ < 0.10%) and no added heavy metals, making it suitable for water-retaining and water-treatment infrastructure. End-users are responsible for confirming compliance with applicable drinking-water contact approvals (e.g., ACS, WRAS, or NSF/ANSI 61) in their jurisdiction prior to specifying CWA-100 for potable water tanks, reservoirs, or pipes.

Active Content	≥ 95%
Chloride Content	< 0.10%
Recommended Dosage	5–10 kg/m³ concrete
Particle Size (D90)	≤ 75 µm
pH (10% slurry, 20°C)	11.5–12.5

Crystalline Waterproofing Additive CWA-100

Specifications

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