Method · Cementitious waterproofing
A crystalline admixture dosed into fresh concrete at the plant or on site. The concrete itself becomes watertight with no overall coating; joints and penetrations get their own detail.
A crystalline admixture dosed into the fresh concrete, so the concrete itself becomes watertight with no overall coating. Construction joints and pipe penetrations still get their own detail.
New water tanks, basements and infrastructure concrete, decided at the design stage.
It must be added when the concrete is poured — for existing buildings, use a surface system instead. The crystals need water to grow and close only fine cracks that do not move.
Layers (built up from the bottom)
The admixture goes in at the batching plant. In contact with water, crystals grow and seal the fine pores.
A thin, level layer over the ground. The structural concrete is poured on top.
The figure shows one typical build-up. The actual layers are decided after we see the site.
Dosed into fresh concrete at the plant or site, it makes the concrete itself watertight with no overall coating; joints and penetrations get their own detail.
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) | 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 Admixturethis page | 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:Metropolitan Waterworks Authority – Samrong Branch Office · Metropolitan Waterworks Authority – Lat Phrao Branch Office · The Thai Red Cross Society · Plexus Factory · Grand Center Point · UNHCR · Metropolitan Waterworks Authority – Min Buri Branch Office · Metropolitan Waterworks Authority – Lat Krabang Branch Office · Metropolitan Waterworks Authority, Bang Phli Branch
The volume of concrete and the dosage the design calls for. It has to be decided at the design stage, so send the drawings and the pour schedule early.
No — it has to go in when the concrete is poured. Existing structures use a system applied to the surface, such as crystallization or a cementitious coating.
No overall coating is needed — the concrete itself becomes watertight. Construction joints and pipe penetrations still get their own treatment (waterstop or crystalline strip).
Send the drawings, what the structure holds and when it will be poured. We propose the system that fits.
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