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.
In business since 2014 · 28-person in-house team · 470+ jobs completed every year · bizSAFE Level 3 · Trained on Bostik and MAPEI systems
Our Core Services
The Three Leak Problems We Fix Most Often
Choose by where you see the water. Not sure? WhatsApp us a photo.
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.
Roof Leakage Repair & Waterproofing
Leaks after heavy rain on RC, metal, and clay tile roofs, repaired at the source with a membrane system that suits the roof.
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.
More Ways We Can Help
Other Waterproofing Services in Singapore
Handled by the same in-house team that does our core leak repairs.
No-Hacking Waterproofing
Leak sealing methods that keep your tiles in place, with honest advice on when they will not work.
Wall Seepage Repair
Internal or external walls that stay damp, grow mould, or keep shedding paint.
Swimming Pool Leak Repair
Pools losing water faster than evaporation explains, located and repaired.
Rope Access Works
Repairs on high-rise facades and hard-to-reach areas, done by rope access instead of scaffolding.
Interior & Exterior Painting
Repainting after a leak repair, or a full refresh for homes and buildings.
How We Work
What Happens After You Contact Us
Five steps, and you know the price before any work starts.
1. Send photos
WhatsApp or call us. Photos of the stain or damp area help us plan the visit.
2. Free site inspection, usually available the same day
A supervisor inspects the area and looks for the source, not just the stain.
3. Written report and quotation
You get the likely cause, photos, and our recommended repair method in writing.
4. Repair by our own team
You pay 50% before work starts and the balance on completion.
5. Handover and warranty
We walk you through the completed work and issue your warranty.
Who We Work For
Waterproofing Contractor for Every Type of Property
Each property type has its own rules on who is responsible and who must agree to the work.
HDB Flats
Responsibility for a leak between flats depends on its cause, and HDB or the town council may be involved. Our report records what we found; the decision rests with the owners and the relevant authority.
Condominiums
We work with owners, MCSTs, and managing agents. Whether a leak falls under private or common property is for the MCST to decide.
Landed Homes
Roofs, external walls, and balconies take the most rain. We handle repairs across the whole house.
Commercial Buildings
Offices, shops, and facilities where downtime costs money. We discuss timing with you before work starts.
Recent Work
Jobs Our Site Teams Have Completed
Real projects, shown with the problem, the method, and the result.
Why Allseal
Why Choose Allseal as Your Waterproofing Company in Singapore
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 company with 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.
Customer Reviews
What Our Customers Say on Google
Unedited reviews from our Google Business Profile.
FAQ
Questions Homeowners Ask Before Hiring Us
Short, straight answers. Still unsure? WhatsApp us a photo.
Do you provide waterproofing services throughout Singapore?
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.
Is your site inspection free, and how soon can you come?
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.
What should I send before the inspection?
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.
What if the leak turns out to be a plumbing problem?
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.
Can I share your inspection report with HDB, my town council, or my MCST?
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.
How does payment work?
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.
What happens if the leak returns after your repair?
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.
Get in Touch
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.
