Water Tank Waterproofing: Stop the Leak, Keep the Water Clean

An underground or overhead concrete tank that leaks wastes water, feeds seepage into walls and, if it leaks inward, lets dirty water in. Tank waterproofing uses coatings approved for contact with water, applied inside after the tank is cleaned and repaired.

The job includes curing time, so plan a few days without the tank in use.

Why it happens in Pakistani homes and buildings

Concrete tanks crack with age, settlement and heat; joints and pipe penetrations weep. Rising damp around an underground tank is often the first sign the owner sees.

Signs you need water tank waterproofing

• Water level dropping without use
• Damp walls or floor near the tank
• Dirty water or sediment appearing in a sealed tank
• Visible cracks or wet patches on an overhead tank

How Shield Agro does water tank waterproofing

1. Empty and inspect. The tank is drained and cleaned, and cracks, joints and weak patches are marked.
2. Crack and joint repair. Cracks are opened and sealed, joints treated and honeycombing repaired.
3. Waterproof coating. A potable-water-grade coating is applied in multiple coats to all internal surfaces.
4. Cure and test. The coating is cured, the tank is filled and monitored for level drop.
5. Clean and refill. The tank is rinsed and handed back ready for use.

What is included

• Draining and cleaning
• Internal crack and joint sealing
• Honeycomb and pipe-entry repair
• Potable-grade cementitious coating
• Water level test
• External wall treatment where seepage has spread

What does water tank waterproofing cost in Pakistan?

Water Tank Waterproofing is priced on site after a free inspection. Priced by tank size and condition, including cleaning, repair and curing. There is no call-out charge, and the price we agree is the price you pay.

How to keep the problem from coming back

• Empty and clean the tank before any inspection
• Use only potable-water-safe products inside tanks
• Allow full curing before refilling
• Check pipe joints and the overflow at the same time

Frequently asked questions

Is the coating safe for drinking water?

We use coatings intended for potable water tanks and rinse the tank thoroughly after curing before it goes back into service. We will show you the product data before starting.

How long is the tank out of use?

Usually two to four days including curing. We coordinate the timing so you can arrange a temporary water supply or fill the overhead tank beforehand.

What affects the price?

The tank’s internal surface area, the amount of crack and joint repair, access for an underground tank, and whether the surrounding walls also need treatment. We inspect and confirm a fixed price on the spot.

Book water tank waterproofing with Shield Agro

We are based in Johar Town, Lahore, and cover waterproofing across Pakistan, with teams in Lahore, Karachi, Islamabad, Rawalpindi, Faisalabad and Multan and scheduled visits elsewhere. Read the full service page for Water Tank Waterproofing, book a free inspection, call 0321-4583500 or message us on WhatsApp with a photo of the problem and your area. We reply under 30 minutes in working hours.