Waterproofing Specialist in Singapore Since 2014
Allseal Waterproofing Pte. Ltd. is a waterproofing specialist in Singapore, based in Ang Mo Kio. Since 2014, our own 28-person team has traced and repaired water leaks in HDB flats, condos, landed homes, and commercial buildings across the island.
Site inspections are free and usually available the same day. You get a written report on where the water is coming from before we quote.
Rated No.1 Waterproofing Contractor on Smart Singa

About Us
Allseal Waterproofing: Singapore's Trusted Waterproofing Experts
Water leakage problems in Singapore are rarely caused by just one issue. A ceiling stain could come from a failed bathroom membrane upstairs, cracked roof slabs, deteriorated sealant joints, or external wall seepage after heavy rain. At Allseal Waterproofing PTE Ltd, we focus on identifying the real source of leakage before recommending any repair work.
Established in 2014, Allseal Waterproofing PTE Ltd (UEN: 201437179H) has worked on waterproofing projects across HDB flats, condominiums, landed houses, offices, warehouses, and commercial buildings throughout Singapore. Over the years, we have handled everything from recurring ceiling leaks and balcony seepage to large-scale roof waterproofing and external facade repairs.
What sets our team apart is our practical, diagnostic-first approach. Instead of relying on temporary patch jobs or unnecessary hacking, we assess moisture movement, crack conditions, drainage flow, and membrane failure points to determine the most effective long-term waterproofing solution.

Trusted By Valued Clients & Corporate Groups
















Our Waterproofing Repair Process
A structured 6-step approach to ensure your property remains leak-free and protected for years.
Locating Leak Source
Identifying exactly where water originates using advanced diagnostic tools for 100% accuracy before we begin any repairs.
Mending Holes
Fixing cracks, holes, or structural damage in walls, floors, or ceilings to stop active seepage and smooth the surface.
Surface Cleaning
Removing grime, dirt, and old residues to ensure the new waterproofing membrane bonds perfectly with the original surface.
Waterproofing Layer
Applying high-grade waterproofing solutions evenly across the surface to create a resilient, long-lasting barrier against moisture.
Patch Gaps & Joints
Sealing all joints, gaps, and seams with specialized watertight compounds to prevent any future vulnerability in the structure.
Final Inspection Report
We provide a comprehensive work report and a formal warranty certificate, giving you complete peace of mind and transparency.
Our Services
Our Waterproofing Services & Repair Solutions

RC Roof Waterproofing
Leaks after heavy rain on RC roofs, repaired at the source with a membrane system that suits reinforced concrete roof decks.

Metal Roof Waterproofing
Leaks after heavy rain on metal roofs, repaired at the source with weather-resistant sealants and coatings suited to metal roofing.

Pitch-Clay Tile Roof Waterproofing
Leaks after heavy rain on pitch and clay tile roofs, repaired at the source with a membrane system that suits tiled roofs.

Ceiling Leakage Repair & PU Injection
Stains or drips on your ceiling, traced first, then treated by PU injection or another method, depending on what the diagnosis shows.

Toilet & Bathroom Leakage Repair
Damp grout, a leaking floor trap, or water seeping through your own toilet floor, sealed without hacking where the condition allows.


Wall Seepage Repair
Internal or external walls that stay damp, grow mould, or keep shedding paint.

No-Hacking Waterproofing
Leak sealing methods that keep your tiles in place, with honest advice on when they will not work.

Interior & Exterior Painting
Repainting after a leak repair, or a full refresh for homes and buildings.

Rope Access Works
Repairs on high-rise facades and hard-to-reach areas, done by rope access instead of scaffolding.

Swimming Pool Leak Repair
Pools losing water faster than evaporation explains, located and repaired.
Why is Waterproofing Essential?
Why is Waterproofing Essential? Professional Waterproofing
Ignoring water leakage can lead to structural damage, mold growth, and costly repairs. Our waterproofing solutions provide:
Enhanced Property Lifespan
Waterproofing prevents cracks, corrosion, and structural weakening, ensuring your property remains strong and durable for years to come.
Protection Against Mold & Dampness
Eliminate moisture buildup and mold growth, creating a healthier indoor environment and preventing damage to walls and ceilings.
Energy Efficiency & Lower Maintenance Costs
A well-sealed home improves insulation, reducing energy consumption and minimizing frequent repair and maintenance expenses.
Increased Property Value
A waterproofed property is more attractive to buyers, increasing its resale value and long-term investment potential
Reliable Waterproofing Solutions Near You!
At Allseal Waterproofing PTE Ltd, we proudly provide expert waterproofing services throughout Singapore with fast response times and professional support.
📍 Central
- Orchard Road
- Marina Bay
- Bugis
- Raffles Place
- Tanjong Pagar
- Clarke Quay
📍 East
- Bedok
- Tampines
- Pasir Ris
- Changi
- Marine Parade
📍 West
- Jurong East
- Jurong West
- Bukit Batok
- Clementi
- Boon Lay
📍 North
- Woodlands
- Yishun
- Sembawang
- Admiralty
📍 North-East
- Hougang
- Punggol
- Sengkang
- Serangoon
Waterproofing Cost in Singapore 2026
Transparent waterproofing pricing for residential and commercial buildings. Professional inspection is recommended for the most accurate quotation.
Ceiling Leak Repair
- Minor crack sealing
- Upper-floor seepage fix
- Fast and clean execution
Bathroom Waterproofing
- Advanced membrane repair
- No-hack tile solutions
- Full leak detection testing
Roof Waterproofing
- Heavy rain protection
- Multi-layer UV coating
- Structural crack repair
Newly Completed Projects - Successful Case Studies and Client Solutions
Explore Allseal Waterproofing latest projects. We deliver top-quality waterproofing solutions for homes and businesses, ensuring durability and excellence.
Why Choose Allseal Waterproofing Waterproofing Services?
Stop Water Leaks Professionally
You get high-quality methods based on the place from us to fix leaks like pros. Plus, our quick application and fast-drying solutions tackle stubborn water issues.
No-hack & Smooth Process
No need for loud hammering, drilling, or messy work with our services. Besides, we waterproof your roof, bathroom, balcony, ceiling, and so on. And, you can save time or money.
Lasts Lifelong
Our waterproofing plans work on various surfaces like tiles, wood, cement, and so on. Thanks to the tools and products, it seals deep into pores and repels water for lifelong protection.
Great Skill & Experience
As the best waterproofing service in Singapore, we focus on the little details to handle them via specialists. Plus, our team has great skills and experience to take care of your place to seal it.
Other Traditional Waterproofing Companies
Lacks Professionalism
Many companies try to deliver a good seal to the home areas using traditional methods. Plus, it takes time and costs more.
Need Hack and Lengthy Process
Traditional waterproofing often needs longer drying times and more time to complete the project. It can also lead to lifelong inconvenience and downtime for repairs.
Missing Durability
Traditional solutions merely coat surfaces with a thin film that is prone to wear and tear. Due to this, it diminishes performance over time. And, this leads to recurring maintenance.
Lacking Skill & Experience
Traditional waterproofing brands often lack the necessary expertise and tools. It also results in inconsistent outcomes that fail to meet expectations.
Why Choose Us
Why Choose Allseal As Your Waterproofing Contractor
Facts you can check, not slogans.
Our Own Crew Does Every Job
All 28 people on our team work for Allseal. Our three site supervisors, Nazrul Islam, Mr Woo, and Si Thu Aung, have 12 to 17 years of work experience in Singapore, including 7 to 9 years each with Allseal.
A Track Record Since 2014
Allseal was founded on 15 December 2014 and is led by our director, Ng Cheng Liang.
We Tell You When a Cheap Fix Will Not Last
If a no-hacking method will not hold, we say so and explain why, before you spend money on it.
We Tell You When It Is Not a Waterproofing Problem
Some leaks come from a cracked pipe, not failed waterproofing. If our inspection points to plumbing, we tell you before quoting any waterproofing work.
Refund If the Original Leak Cannot Be Fixed
If a leak covered by our warranty returns during the warranty period, we inspect and rectify it at no extra cost. If reasonable rectification attempts still fail, we refund the payment received for the affected waterproofing works, subject to our warranty terms.
470+ Jobs Completed Every Year
- 100+ successful projects across Singapore
- Residential and commercial clients
- Consistent positive feedback
Our Successfully Completed Projects
Waterproofing Endeavors
Discover our latest achievements in the Recent Projects Showcase. This section highlights our most recent completed projects, featuring the names of the buildings alongside vivid images. Delve into our portfolio to see the quality and scope of our waterproofing solutions in action, illustrating our commitment to excellence and client satisfaction. Each project is a testament to our skilled team’s ability to meet and exceed expectations in diverse environments.
5-Star Happy Customer Reviews
Waterproofing Services Across Every Region of Singapore
As a specialist waterproofing contractor in Singapore, Allseal works on every kind of property across the island. Our waterproofing specialists in Singapore serve HDB towns, private estates, industrial and commercial estates in the East, West, North, North-East and Central — including bathroom leakage repair, RC roof waterproofing, balcony waterproofing, ceiling leakage repair, wall seepage repair and interior & exterior painting.
- Tampines & Pasir Ris
- Bedok & Kallang
- Hougang, Sengkang & Punggol
- Serangoon & Ang Mo Kio
- Bishan & Toa Payoh
- Geylang & Bukit Timah
- Orchard & River Valley
- Clementi & West Coast
- Jurong & Boon Lay
- Choa Chu Kang & Bukit Batok
- Woodlands & Yishun
- Marina Bay, Sentosa & Tuas
✓ Waterproofing specialist since 2014 ✓ 100+ completed projects ✓ Licensed & insured ✓ Free site inspection ✓ Written report & warranty ✓ 5-star Google rating
Book a Free Leak Inspection Anywhere in Singapore
Tell us where the water is showing and send a photo. We usually reply within a short time. Call or WhatsApp us at +65 8360 1752.
What Our Customers Say on Google
What Our Customers Say on Google
At Allseal Waterproofing, our goal is to give our clients the best service possible. Here’s some feedback from our happy customers:

“Allseal Waterproofing really made a difference in our home! They also fixed our leaky balcony so quickly. Plus, we haven’t had any issues thanks to their work. Overall, love their service!”
- Aiden Ming

“The support team is incredible. Plus, they took on our complex roof waterproofing project and nailed it! The results were also fantastic. Big thanks to the team for their hard work!”
- Aria Wong

“I’m so happy with the outcome of Allseal Waterproofing to get rid of the water issue in my bathroom! It’s also super quick, mess-free, and works perfectly. Honestly, it’s been such a game-changer for my home. “
- Ryan Lou
FAQs
Yes. We cover the whole of Singapore from our office in Ang Mo Kio, including HDB estates, condos, landed homes, and commercial buildings. Our free site inspection applies wherever you are on the island, and our supervisors handle residential and commercial jobs alike.
The inspection is free, with no obligation to go ahead. In most cases we can visit the same day you contact us, depending on the day’s schedule. A supervisor checks the affected area, explains what they found, and follows up with a written report and quotation.
Two or three clear photos of the stain or damp area, your property type, and roughly where in the home the water appears. Tell us when it shows up too, for example after heavy rain or after someone showers. These details help our supervisor narrow down the likely source before arriving.
It happens often. A slow drip from a cracked supply pipe can look exactly like failed waterproofing. If our inspection points to plumbing, we tell you plainly before quoting any waterproofing work, so you only pay for a fix that addresses the real cause.
Yes, you can share it. The report includes photos, the likely cause, and the repair method we recommend, which can help when you discuss the leak with a neighbour or the relevant body. HDB, the town council, and the MCST make their own assessment, so ask them what they need from you.
You receive a written quotation before any work begins, so the price is agreed upfront. We collect 50% of the quoted amount before work starts and the remaining 50% once the work is completed.
Contact us. If the original leak returns within the warranty period and is covered by the warranty, we re-inspect and rectify it at no extra cost. If reasonable attempts still fail, we refund the payment received for the affected works. New leaks in untreated areas are assessed separately, as set out in our warranty terms.
Visit Our Office
Get in touch with Singapore’s trusted waterproofing specialists. We are ready to assist you with any leakage or structural concerns.
Singapore 560215
Waterproofing Guides & Resources
Practical advice from Allseal’s certified specialists:
Waterproofing cost guide (2026) · Types of waterproofing membranes · How to choose a waterproofing contractor · Complete waterproofing guide · Signs of water damage · BCA-registered contractor: what it means · All waterproofing guides · Homeowner tips · Balcony waterproofing articles · Bathroom leak articles



















