Sump & Water Tank Waterproofing

At Rainexa Waterproofing Solutions, we offer expert waterproofing services for underground sumps and overhead water tanks, ensuring your water stays clean, safe, and leak-free. Over time, concrete and masonry tanks are prone to cracks, seepage, and algae formation. Our specialized waterproofing systems prevent water leakage, structural damage, and contamination—safeguarding both your building and your health.

Why Waterproof Your Sump or Water Tank?

✔ Prevent water seepage into walls and foundations
✔ Avoid contamination from algae and fungus
✔ Protect against structural cracks and corrosion
✔ Minimize water wastage and frequent cleaning
✔ Ensure safe storage for drinking or domestic use

Our Process

1. Inspection & Surface Cleaning
   We assess the tank/sump and clean the surface thoroughly to remove dirt, algae, and laitance.

2. Crack Filling & Repairs
   All visible cracks and joints are repaired using polymer-modified mortar or non-shrink grouts.

3. Waterproof Coating Application
   We apply 2–3 coats of non-toxic waterproofing material, such as:

   • Cementitious coating

   • Crystalline waterproofing

   • Food-grade epoxy (for drinking water tanks)

4. Curing & Testing
   After curing, a water retention test is conducted to ensure total leakproofing.

Suitable For

• Underground sumps

• Overhead RCC water tanks

• Fire water & industrial water storage

• Raw water reservoirs & storage pits

• New construction & leaking tanks

Why Choose Rainexa?

✅ Safe, non-toxic coatings
✅ Long-lasting leak protection
✅ ISI-approved materials
✅ Fast, expert application
✅ Up to 10-year warranty
✅ Available across Hyderabad & Telangana