Method · Cementitious waterproofing
Cement powder mixed with a liquid polymer and brushed or trowelled on in two coats. The polymer lets it follow small movement — for water tanks, pools and basements.
Cement powder mixed with a liquid polymer, brushed or trowelled on as a thin coat. The polymer gives it enough flexibility to follow small movement.
Water tanks, pools and basements — a potable-water grade is available for tanks that hold drinking water.
Applied in two coats on a damp surface with no standing water; the tank is filled for the water-holding test only after the cure time in the product's data sheet (usually several days).
Layers (built up from the bottom)
Applied once the first coat has set, to build an even thickness.
Applied to the damp substrate. It bonds with the concrete to stop water.
Soaked with water, surface left just dry, so it won’t draw water out of the coating.
The figure shows one typical build-up. The actual layers are decided after we see the site.
Applied in two coats on a damp surface with no standing water; the tank is filled for the water-holding test only after the cure time in the product's data sheet (usually several days).
Roofs and tanks get a water (ponding) test before handover; the result is signed off jointly.
Cementitious systems are chosen by whether the concrete is new or existing, and where it is. If another one fits better, we will say so.
| System | Strength | Where |
|---|---|---|
| Surface Apply — Polymer Modified (A+B)this page | Follows substrate movement, resists cracking | Water tank, pool, below ground |
| Surface Apply — Rigid Slurry (1-part) | Low-cost, but weak to cracking | Simple, low-budget |
| Crystallization | Crystals grow in the pores and close fine, non-moving cracks | Below ground, foundation, tunnel |
| Integral Admixture | Makes the concrete itself watertight — joints treated separately | New waterproof concrete |
| Active Leak Plugging (Water Plug) | Plugs a running leak in minutes | Emergency leak stop |
Also with this method:MRT Orange Line
The area, the state of the substrate (cracks, wet spots, or an old membrane to remove), the system and number of layers, whether it is exposed to the sun, and the hours we can work. Send photos and drawings on LINE and we will check the site and quote.
Yes — a potable-water grade is available for tanks that hold drinking water.
It is applied in two coats on a damp surface. The tank is filled for the water-holding test only after the cure time in the product's data sheet — usually several days (about 3 to 14) — which we confirm first.
Send the drawings, what the structure holds and when it will be poured. We propose the system that fits.
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