Stay connected with us on social media
Water Tank Leakage Solution Guide: Waterproofing, Repair, and Maintenance
Water tank leakage is one of the most common maintenance issues faced in residential, commercial, and industrial properties. Tanks installed on terraces, underground areas, or exposed outdoor locations are especially vulnerable to environmental stress, ageing, and pressure-related damage over time.
Selecting the right water tank leakage solution is essential for protecting the tank structure and maintaining efficient water storage. This article explains the common causes and warning signs of leakage, how to identify the source of damage, and the best repair methods for both concrete and plastic tanks.
Table of Contents
- Common Signs of Water Tank Leakage
- What Causes Water Tank Leakage?
- How to Identify the Source of Tank Leakage
- Best Water Tank Leakage Solutions for Concrete Tanks
- Best Plastic Water Tank Leakage Solutions
- Quick Comparison of Water Tank Repair Solutions
- Mistakes to Avoid During Tank Leak Repairs
- How to Prevent Future Water Tank Leakage
- Conclusion
Common Signs of Water Tank Leakage
Identifying leakage at an early stage can help prevent extensive damage and costly repairs. Some common indicators include:
- Continuous water loss despite limited usage
If the water level drops consistently, even when consumption remains low, there may be hidden seepage or cracks in the tank structure.
- Damp patches around the tank area
Moist walls, wet flooring, or damp ceilings near the tank area often indicate water escaping from cracks or joints.
- Cracks, seepage, or dripping water
Visible cracks or continuous dripping are strong signs that the tank requires immediate attention and a suitable fix.
- Algae or moisture build-up near joints
Persistent moisture near pipe connections or tank joints can encourage algae growth and indicate leakage points.
- Reduced water pressure in connected systems
Leakage can lower water pressure in taps, showers, and connected plumbing systems due to continuous water loss.
| Our Recommendation: Our Alldry Crack Master Paste is a great option for repairing hairline and surface cracks in water tanks before waterproof coatings are applied. |
What Causes Water Tank Leakage?
Understanding the root cause of leakage is important before selecting the right repair method.
1. Cracks in Concrete Tanks
Concrete tanks often develop cracks due to shrinkage, ageing, thermal expansion, or structural movement. These cracks are particularly common in underground and terrace tanks exposed to weather changes and constant water pressure. In such cases, a reliable cement water tank leakage solution becomes necessary to restore waterproofing performance and structural stability.
2. Joint and Pipe Connection Failures
Leakage frequently occurs around inlet and outlet pipes due to loose fittings, poor sealing, or pipe movement. Over time, constant vibration and pressure can weaken these joints and cause seepage.
3. Plastic Tank Surface Damage
Plastic tanks can suffer from impact damage, UV exposure, and material degradation. Long-term sunlight exposure may weaken the surface and create small cracks or punctures. Choosing the right leakage solution is essential to ensure effective repairs without damaging the tank material further. In addition, the surface beneath the tank should be properly waterproofed, as water seepage from leaks can gradually damage the supporting slab and terrace, leading to structural deterioration over time.
4. Poor Waterproofing or Maintenance
Ignoring small cracks, delaying repairs, or failing to maintain waterproof coatings can worsen leakage over time. Minor seepage can eventually develop into larger structural problems if not treated early.
How to Identify the Source of Tank Leakage
Before applying any repair product or waterproofing treatment, it is important to identify the exact leakage source.
- Inspect visible cracks and joints
Carefully examine the internal and external tank surfaces for visible cracks, gaps, or deteriorated joints.
- Check inlet and outlet pipe connections
Inspect plumbing connections for loose fittings, dripping water, or signs of moisture accumulation.
- Monitor water level drop patterns
Observe how quickly the water level decreases when the tank is not in active use. This can help determine whether the leakage is continuous or pressure-related.
- Test suspected areas with controlled water filling
Fill the tank partially and monitor specific sections to identify seepage points. Marking damp areas can help during repair work.
Best Water Tank Leakage Solutions for Concrete Tanks
Concrete tanks require durable, waterproof repair systems capable of handling structural movement and constant moisture exposure.
Crack Filling with Waterproof Mortar
Waterproof mortar is commonly used for filling hairline and medium-sized cracks in concrete tanks. This method restores surface integrity and prevents further seepage. As a dependable leakage solution, waterproof mortar works well for repairing shrinkage cracks and damaged plaster areas.
Benefits include:
- Strong bonding with concrete surfaces
- Good water resistance
- Suitable for internal and external repairs
- Cost-effective repair method
Cementitious Waterproof Coatings
Cementitious coatings create a waterproof protective layer over the tank surface. These coatings are widely used for internal waterproofing of concrete water tanks.
This type of leakage solution is highly effective because it forms a seamless barrier that resists water penetration and dampness.
Advantages include:
- Easy application on concrete substrates
- Strong adhesion
- Long-term waterproofing protection
- Suitable for potable water tanks
| Our Recommendation: The Alldry Repair Master works well for repairing damaged surfaces, strengthening repair mortar, and improving waterproof bonding in leakage-prone tank areas. It is particularly useful for concrete tanks showing signs of surface wear, plaster damage, or recurring seepage. |
Epoxy or Polyurethane Sealants
Epoxy and polyurethane sealants are effective for sealing active seepage areas, joints, and pipe connection gaps. These sealants remain flexible and can accommodate slight movement within the structure, making them a practical water tank leakage fix for dynamic leakage areas.
They are commonly used for:
- Pipe joints
- Construction joints
- Expansion gaps
- Persistent seepage zones
Internal Waterproof Lining
Internal waterproof linings provide enhanced long-term leak resistance by creating an additional waterproof membrane inside the tank. This tank leakage solution is often recommended for older tanks experiencing repeated leakage issues or surface deterioration.
Benefits include:
- Improved durability
- Enhanced chemical and water resistance
- Reduced maintenance requirements
- Better long-term performance
Best Plastic Water Tank Leakage Solutions
Plastic tanks require repair systems specifically designed for flexible polymer surfaces.
Waterproof Adhesive Sealants
Waterproof adhesive sealants are suitable for repairing small punctures, surface cracks, and minor leakage points in plastic tanks. This solution is simple to apply and works effectively for temporary or moderate repairs.
Advantages include:
- Easy application
- Fast repair process
- Good adhesion to plastic surfaces
- Suitable for small leaks
Heat Welding Repairs
Heat welding is commonly used for repairing larger cracks in plastic tanks. This process melts compatible plastic material into the damaged section to create a strong bond. For severe structural cracks, heat welding is often the most durable water tank leakage fix for plastic tanks.
Benefits include:
- Strong and permanent repair
- Restores structural integrity
- Suitable for HDPE and plastic tanks
- Long-lasting performance
Leak Repair Tapes
Leak repair tapes provide a temporary sealing solution for minor leaks and emergency repairs. While not a permanent solution, these tapes can help minimise water loss until proper repairs are completed.
They are useful for:
- Small punctures
- Temporary emergency sealing
- Quick external repairs
Quick Comparison of Water Tank Repair Solutions
| Solution | Best For | Durability |
| Waterproof mortar | Concrete cracks | High |
| Cementitious coating | Internal waterproofing | High |
| Epoxy sealant | Joints and seepage | Moderate to high |
| Repair tape | Temporary fixes | Low |
| Plastic welding | Plastic tank cracks | High |
Mistakes to Avoid During Tank Leak Repairs
Improper repair methods can reduce the effectiveness of waterproofing treatments and lead to recurring leakage.
- Repairing without cleaning the surface
Dust, algae, grease, or loose particles can weaken adhesion and reduce repair durability. - Using incompatible sealants
Using the wrong repair material for concrete or plastic surfaces may lead to poor bonding and premature failure. - Ignoring structural cracks
Surface patching alone may not solve deeper structural problems. Large cracks should be inspected properly before repairs. - Refilling the tank before curing completes
Most waterproofing products require adequate curing time. Refilling the tank too early can compromise the repair performance.
| Our Recommendation: Our Alldry Total 2K is suitable for long-term waterproofing protection in concrete water tanks exposed to continuous moisture and water pressure. Its flexible waterproof coating helps create a durable barrier that improves leak resistance and overall tank protection. |
How to Prevent Future Water Tank Leakage
Preventive maintenance is essential for reducing long-term repair costs and extending the lifespan of both concrete and plastic water tanks. Regular inspection of cracks, joints, and pipe connections helps identify minor leakage points before they develop into serious structural problems. Terrace tanks should not be overloaded, as excessive water pressure can create stress on the structure and lead to cracking over time.
Periodic maintenance of waterproof coatings is also important, as worn-out protective layers can allow seepage and moisture penetration. For plastic tanks, prolonged exposure to direct sunlight should be avoided wherever possible, since UV rays can weaken the material and increase the risk of cracks or surface damage.
Long-Term Protection Starts with Timely Repairs
Water tank leakage should never be ignored, regardless of whether the tank is made from concrete or plastic. Small cracks and seepage points can quickly develop into larger structural issues, causing water wastage, dampness, and expensive repairs.
Selecting the right water tank leakage solution depends on factors such as tank material, leakage severity, and environmental exposure. Regular maintenance, timely inspections, and proper waterproofing practices can significantly reduce the chances of recurring leakage problems in the future.
Explore The Next Steps
Pick Your Colours – Explore the Birla Opus Colour Catalogue and find the perfect shade for your space.
Visualise Your Walls – Try the Birla Opus Visualiser and see how different paints look in real time.
Browse Waterproofing Products – From interiors to exteriors, discover our complete range.
Book Painting Services – Get expert end-to-end painting solutions from Birla Opus professionals.
Opus Assurance – Enjoy superior painting backed by our commitment to quality with easy registration, hassle-free claims, free repainting (product + labour), and the freedom to choose your preferred contractor.
Paint Cost Calculator - Use the Birla Opus Paint Cost Calculator to get a quick cost overview for your space
Sign up for our colour letter
Get vibrant ideas, expert decor tips, and colour trends to keep you updated
Popular searches
Back to Select colour
Step
Selected colour
2 Select quantity for "The clouds have shape"
Item added to cart
Terms and Conditions
This Website/ App is owned by Grasim Industries Limited, Birla Paints division (“Grasim”).
“we” / “us” / “our” means Grasim Industries Limited (Grasim)
“You” or “your” means any person who visits our Website/ App.
Please read these Terms and Conditions of use carefully before using this Website/App. The Terms and Conditions set forth below (the "Terms") as well as those contained in the Privacy Policy of the Website/App governs your use of the Website/App and are legally binding on you. If you do not agree to all of these Terms or Privacy Policy, do not use access or otherwise this Website/App or any information contained on the Website/ App.
Your use of the Website/App shall be deemed to be your understanding of, and agreement, to each of the Terms set forth herein. Grasim may revise and update these Terms from time to time. Your continued usage of the Website/App shall be considered as an implied acceptance/deemed consent to abide by these Terms for usage of this Website/App.
Privacy Policies
1. PURPOSE
Thank you for visiting our Website/ App. This Website/ App is owned by Grasim Industries Limited, Birla Paints division (“Grasim”). This Privacy Policy is designed to tell you about our practices regarding collection, use, and disclosure of information that you may provide via this Website/ App. Grasim is committed to protecting the privacy of every individual who installs and/or uses the Website/App. We have adopted the following Privacy Policy, which sets out the basis on which any personal data we collect from you, or that you provide to us, will be handled and dealt by us through your use of the Website/App. Please be sure to read this entire Privacy Policy before using, or submitting any information, to this Website/App, which is intended for use by residents of India.
2. SCOPE OF APPLICATION
- This policy will be applicable to all personally identifiable information that you provide to Grasim while visiting or using the Website/App. This Website/App contains links to other Apps. Please be aware that we are not responsible for the content or privacy practices of such other Apps. We encourage our users to be aware when they leave our Website/App and to read the privacy statements of any other App that collects personally identifiable information.
- Grasim expressly reserves the right to change this Privacy Policy periodically in future which will be exercised at its sole discretion, and at such intervals of it choosing the right without prior notice to the users. User shall review our Privacy Policy available at the Website/App regularly to be sure you are fully updated with our current practices and procedures in this area. Your continued use of the Website/App will be subject to the then-current Privacy Policy.
- The following discloses our information gathering and dissemination practices for the Website/App:
- Overview: As part of the normal operation of the Website/App, we collect and, in some cases, may disclose personally identifiable information about you. This Privacy Policy describes the personally identifiable information we collect about you and what may happen to that information.
- By accepting this Privacy Policy and our Terms of Use, you expressly consent to collect, store, delete, use, combine and disclose your personally identifiable information in the manner prescribed in this Privacy Policy. This Privacy Policy is incorporated into and is subject to the conditions of the Terms of Use and governs all use of the Website/App by You.
- We may collect your name, address, email address, telephone number, location data and other personally identifiable information you submit on the Website/App. Such personally identifiable information will not be posted in areas of the Website/App viewable by the public or users of the Website/App. Location data is collected for the purpose of enabling real-time surveyor allocation and improving operational efficiency in assigning site visits.
- By using this Website/App, you agree with the terms of this Privacy Policy. Whenever you submit information via this Website/App or through any other mode, you consent to the collection, use, and disclosure of that information in accordance with this Privacy Policy.
3. DATA GATHERING
Collection of Information: We may collect information that you share with us through your use of our Website/App, for example by:
- E-mailing or writing to us using the contact details posted on our Website/App; or
- Submitting other enquiries.
4. OUR USE OF YOUR INFORMATION
Our primary goal in collecting personally identifiable information is to provide you with a smooth, efficient and customized experience. This allows us to provide services and features that are most likely to meet your needs, and to customize the Website/App and our services to make your experience easier. We may use the information we collect from you to provide you with information and services that you request from us. We use personally identifiable information in the files we maintain about you, and the other personally identifiable information we obtain from your current and past activities on the Website/App to provide you with services.
4.1. Our Disclosure of Your Information
- Due to the existing regulatory environment, we cannot ensure that all of your private communications and other personally identifiable information will never be disclosed in ways not otherwise described in this Privacy Policy. By way of example (without limiting the foregoing), we may be required to disclose personally identifiable information to the government, law enforcement agencies, or third parties under certain circumstances; third parties may unlawfully intercept or access transmissions or private communications; or users or authorized users may independently abuse or misuse your information that they collect from the Website/App in violation of our Website/App’s Privacy Policy and Terms of Use. Therefore, although we use industry standard information security practices to protect your privacy, we do not promise, and you should not expect, that your personally identifiable information or private communications will always remain private.
- As a matter of policy, we do not sell or rent any personally identifiable information about you to any third party. However, the following describes some of the ways that your personally identifiable information may be disclosed.
- Other Corporate Entities: We may sometimes share data with our affiliates, associates, subsidiaries, joint ventures, group entities, and third-party service providers that provide us with services and/or provide you with services. To the extent that these entities have access to your personally identifiable information, we will ask them to treat it at least as protectively as they treat personally identifiable information they obtain from their other authorized users or members. Our affiliates, subsidiaries, and joint ventures will follow privacy practices no less protective of all authorized users and members than our practices described in this document, to the extent allowed by applicable law. It is possible that Grasim, its subsidiaries, associates, affiliates, joint ventures or any combination of such, could merge with or be acquired by another business entity. Should such a combination occur, you should expect that Grasim would share some or all of your personally identifiable information in order to continue to maintain and provide access to the Website/App.
- Legal Requests: Grasim co-operates with law enforcement inquiries, as well as other third parties to enforce laws relating to matters, such as intellectual property rights, fraud and other rights. We can (and you authorise us to) disclose any personally identifiable information about you to law enforcement and other government officials as we, in our sole discretion, believe reasonably necessary or appropriate, in connection with any investigation.
4.2. Changing Your Personally Identifiable Information
In case you request to remove your personally identifiable information from our records, we will retain such information in our files and databases, in order to use it in some unavoidable circumstances, such as to resolve disputes, troubleshoot problems, and enforce our terms and conditions. Further, such prior personally identifiable information is never completely removed from our databases due to technical and legal constraints, including stored "back up" systems. Therefore, you should not expect that all of your personally identifiable information will be completely removed from our databases in response to your requests.
6. SECURITY
Grasim will use reasonable security measures to safeguard the confidentiality of your personal identifiable information. Although we will put our best efforts to protect your personal data, we cannot guarantee the security of your data transmitted to our Website/ App; any transmission is at your own risk. Once we have received your information, we will use strict procedures and security features which are appropriate to the type of personal information you have provided to try to prevent unauthorised access or inadvertent disclosure. However, you agree and acknowledge that "perfect security" does not exist on the Internet.
7. CHANGES TO OUR PRIVACY POLICY
We reserve the right to change, suspend, or discontinue any aspect of the Website/ App at any time. Any modifications we may make to our privacy policy in the future will be posted on this page. Continued use of the Website/App will signify that you agree to any such modifications.
8. LEGAL DISCLAIMER
This is the official Website/ App of Grasim Industries Limited and provides general information about Grasim Industries Limited. The information and content are based on the laws applicable in India. While efforts are made to keep the information on this Website/App accurate and timely, Grasim does not guarantee or endorse the content, accuracy or completeness of the information, text, graphics, hyperlinks and other items contained herein or on any other server. This Website/ App and the materials, information, and references to services and products if any herein, including without limitations, text, graphics and links, are provided "as is" without representations or warranties of any kind, whether express or implied. To the fullest extent permissible, Grasim disclaims any warranties, express and/or implied, including but not limited to implied warranties of merchantability, fitness for a particular purpose, non-infringement, freedom from computer virus and warranties arising from course of dealing or course of performance. Grasim does not represent or warrant that the functions contained in the Website/ App will be uninterrupted or error free, that defects will be corrected or that the Website/App or the server that makes the Website/App available are free of viruses or other harmful components. Grasim does not make any warranties or representations regarding the use of the materials in the Website/App in terms of their completeness, correctness, accuracy, adequacy, usefulness, timeliness, reliability or otherwise. Users, shall always keep indemnified, defend and hold Grasim, its affiliates, and their respective officers, directors, employees and agents harmless, from and against any claims, demands, causes of action, debts or liability, costs and expenses, including, without limitation, attorney's fees, based upon or relating to a third party claim against Grasim arising from any action or inaction of User or for any liability or expense-due to claims for personal injury or damage to property arising out of the fault or negligence of the User. Grasim is not responsible for any special, indirect, incidental or consequential damages that may arise from the use of or the inability to use, the Website/App and/or the materials contained on the Website/App irrespective of whether the materials contained on the Website/App are provided by Grasim. The contents of this Website/App are subject to change without notice. Commercial use of any of the contents of this Website/App in any manner is prohibited without prior written permission from an authorised person. No reproduction of any part of the Website/App may be sold or distributed for commercial gain nor shall it be modified or incorporated in any other work, publication or Website/App, whether in hardcopy or electronic format, including postings to any other App. Grasim reserves all other rights. No information on this Website/App shall constitute an invitation to invest in the listed companies belonging to the “Aditya Birla Group” conglomerate. Neither Grasim nor the entities belonging to the “Aditya Birla Group” conglomerate, nor their respective officers, employees or agents shall be liable for any loss, damage or expense arising out of any access to or use of this Website/App or any App linked to it, including, without limitation, any loss or profit, loss of business, loss of use, indirect, incidental or consequential loss. By viewing this Website/App you are deemed to agree to jurisdiction of the courts at Mumbai, India in respect of any action arising therefrom or related thereto.
If you have any questions about this Policy or other privacy concerns, you can also email us at legal.birlapaints@adityabirla.com
August 2023
9. Customer Consent
By agreeing to this privacy policy, you agree to receive promotional messages, offers, and updates from the Company via SMS, RCS (Rich communications message service), WhatsApp, Call, etc.
GRASIM INDUSTRIES LIMITED, Birla Paints division
9th floor, Birla Centurion, Century Mills Compound, Pandurang Budhkar Marg, Worli, Mumbai– 400030, Maharashtra, India.
Registered Office:
Birlagram, Nagda- 456 331 (M.P.) Tel: (07366) 246760-66, Fax: (07366) 244114, 246024, CIN: L17124MP1947PLC000410
Allwood Contractor App Helpdesk
Call: 1800 120 1234, Monday to Saturday, 09:30 am – 6:30 pm (Except Public Holidays).
Email: Opuscare@adityabirla.com
Product Warranty
Terms and Conditions for product warranty registration of Birla Opus products
The Warranty shall be effective from the date of purchase of the Product as per the tax invoice (“Warranty Start Date”), provided that painting work is fully complete, and the Consumer registers the Product for warranty.
The Product must be registered within 15 days from the date of purchase by calling customer care at 18001201234 or registering on www.birlaopus.com and furnishing purchase details as required during the Warranty registration.
The Warranty shall be valid for parameters and period as defined in the respective product warranty document (‘Warranty Period’) from the Warranty Start Date.
Upon settlement of any claim, Warranty of replaced Product will not start afresh, and will continue for the remainder of the Warranty Period from the Warranty Start Date.
If there is a break/ lag in completing the painting work, the registration of the Warranty and Warranty Start Date will be determined by the Company at its sole discretion.
The Company may appoint a person to examine and confirm the application of the Product as per the directions specified prior to registering the Warranty.
For registering of Warranty, where quantity of Product purchase is equal to or more than 200 litres, please call our Helpline on 1800 120 1234 with requisite details. The registration of Warranty in such cases is subject to a satisfactory pre‐inspection at site by Company’s representative.
- For the warranty to be applicable:
- Minimum volume of the product required to be purchased needs to be met
- Birla Opus recommended system needs to be used
- Product coverage and application guidelines need to be adhered
For more details, please refer to respective product specific warranty document and product information sheet.
Consumer may raise a claim within 30 days of discovering issue(s) noticed on the affected areas based on Warranty Parameters/ scope
The Consumer is required to notify the Company of the issue(s) noticed along with the invoice details, sample pictures and basis for Warranty invocation by contacting the customer care at 1800 120 1234. The Consumer shall provide such additional details as required by the Company and/or allow the Company to visit/inspect the painting site either in portion or entirety at the Company’s discretion.
In case where the Company decides that the Warranty is applicable on the issue(s) noticed on the affected areas, the Company shall bear the Replacements Costs as detailed in respective product warranty document to repair/ repaint the affected areas.
Replacement Costs shall mean the cost of material and labour required to correct the affected portions, as determined by the Company.
In case where the Company decides that Warranty is not applicable, the same shall be communicated to the Consumer.
Warranty is applicable only to the affected area where the Product is used in accordance with application guidelines and not to the rest of the areas.
In case the Consumer carries out repair works on the areas covered under the Warranty, the same shall be at their own risk and the Company’s Warranty on the Product shall not be valid on such repaired areas.
The Warranty will cover only manufacturing defects of the Product and will not cover any defects arising out of factors not in control of the Company. For more details of exclusions, please refer to the warranty document of respective product.
Except expressly stated, the Company disclaims any liabilities whether in contract, tort or otherwise. The Company makes no warranty regarding merchantability or fitness of products for any particular purpose.
The Company shall not be held liable towards loss or damages of incidental, indirect or consequential nature or for any value more than the tax invoice value.
In case of any disputes, exclusive jurisdiction of the courts of Mumbai shall apply. Governing laws shall be Laws of India.
The facts and all matters concerning any Warranty/ claim/ dispute will always be kept confidential by both the Consumer and the Company.
Saved to favourites. Want expert help? Book a free site survey.
Love this look? Our experts can recreate it for you
Just a few more details
Share a few details to ensure a smooth and well-planned survey
Project Requirements
Tell us about your project
What type of painting requirements do you have?
What is your
home configuration?
Almost there!
Please specify your project requirements.
(Select all that apply)
