Your overhead tank holds tonnes of water under constant pressure, every hour of the year. Even a hairline crack means continuous seepage into the slab and walls below — plus contamination risk in the water your residents drink. We seal it properly.
Unlike a terrace, a tank doesn't get a dry season. Hydrostatic pressure pushes water into any imperfection around the clock. What typically fails:
The visible symptoms — damp patches on the terrace or top-floor ceiling, moss streaks down the building face, corroding rebar around the tank — all continue growing until the tank itself is treated.
| Method | Crack & joint treatment + waterproofing suited for water-retaining structures |
|---|---|
| Tank downtime | Planned with the society — typically brief, scheduled around supply hours |
| Water hygiene | Sealing prevents entry of dust, algae and contaminants |
| Non-leachable | Bonds chemically to the concrete — doesn't dissolve back out |
| Chemistry | Water-based, low-VOC — no solvent fumes during application |
| Works in monsoon | Yes — tank work runs year-round |
| Also protects | Terrace slab and walls below the tank |
| Warranty | Notarized on stamp paper · duration set at inspection |
It's the first question any resident asks about tank waterproofing, and it's the right question: if you're treating the walls that hold our drinking water, what happens to that chemical afterwards?
Our treatment reacts chemically with the concrete and becomes part of the structure rather than a coating sitting inside it. It is non-leachable — it doesn't dissolve back out into what you store, and there's no film to flake, peel or shed into the water the way failing internal coatings do.
The chemistry is also water-based and low-VOC, releasing a fraction of the volatile organics of solvent-based alternatives. In practice that means no solvent fumes during application and nothing harsh introduced into an enclosed tank — better for the applicators working inside it and for the residents living below.
Ask for these at quotation stage — any contractor treating your water tank should be able to produce them.
We inspect the drained tank to map cracks, joint condition and pipe penetrations — the real leak sources.
Cleaning and preparing internal surfaces without structural damage.
Every crack, construction joint and pipe penetration is individually treated — these carry the pressure.
Applied to withstand permanent immersion and hydrostatic pressure, keeping stored water clean.
The tank is refilled and monitored before we hand it back.
Completion report plus your stamp-paper warranty document.
Site inspections across Mumbai, Thane & Pune this week.
