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 Certified
Trained on Bostik and MAPEI Systems
4.8★ Rating, 150+ Google Reviews

Rated No.1 Waterproofing Contractor on Smart Singa

Rated
Free Quote
Trusted On Google

Discover why users consistently choose and trust us on Google. Our commitment to quality and reliability ensures your satisfaction every time.

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.

Waterproofing Specialist in Singapore

Trusted By Valued Clients & Corporate Groups

people association
Tampines Central
CW Services LOGO
Leeden NOX
people association
Tampines Central
CW Services LOGO
Leeden NOX

Our Waterproofing Repair Process

A structured 6-step approach to ensure your property remains leak-free and protected for years.

01

Locating Leak Source

Identifying exactly where water originates using advanced diagnostic tools for 100% accuracy before we begin any repairs.

02

Mending Holes

Fixing cracks, holes, or structural damage in walls, floors, or ceilings to stop active seepage and smooth the surface.

03

Surface Cleaning

Removing grime, dirt, and old residues to ensure the new waterproofing membrane bonds perfectly with the original surface.

04

Waterproofing Layer

Applying high-grade waterproofing solutions evenly across the surface to create a resilient, long-lasting barrier against moisture.

05

Patch Gaps & Joints

Sealing all joints, gaps, and seams with specialized watertight compounds to prevent any future vulnerability in the structure.

06

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

Full-service waterproofing in Singapore: roof and RC roof waterproofing, bathroom and toilet leakage repair, balcony waterproofing, ceiling leakage and seepage repair, wall seepage repair, tank and swimming pool waterproofing, no-hacking waterproofing and exterior painting. Our waterproofing specialists cover HDB towns and private estates island-wide — Tampines, Bedok, Pasir Ris, Hougang, Sengkang, Punggol, Ang Mo Kio, Bishan, Toa Payoh, Geylang, Serangoon, Bukit Timah, Clementi, Jurong, Choa Chu Kang, Woodlands, Yishun, Bukit Batok, Orchard, River Valley, Marina Bay, Sentosa and Tuas.
RC Roof Waterproofing

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

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 Tiles Waterproofing

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

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.

Bathroom Water Leakage Repair Service

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.

Balcony Waterproofing Services

Balcony Waterproofing

Balconies that pond after rain or leak into the unit below.

Wall Seepage Repair

Wall Seepage Repair

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

No-hacking Waterproofing

No-Hacking Waterproofing

Leak sealing methods that keep your tiles in place, with honest advice on when they will not work.

interior exterior paintin

Interior & Exterior Painting

Repainting after a leak repair, or a full refresh for homes and buildings.

Rope Works Access

Rope Access Works

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

Swimming Pool Leak Repair

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

Service Areas

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
Pricing Guide

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

$300 – $800
  • Minor crack sealing
  • Upper-floor seepage fix
  • Fast and clean execution

Roof Waterproofing

$1.5K – $5K+
  • Heavy rain protection
  • Multi-layer UV coating
  • Structural crack repair

Gallery

Showcasing Our Work A Visual Journey

Transformations by Allseal Waterproofing Explore our gallery of real-world challenges and solutions. See how our expert waterproofing services have transformed problematic areas into secure, dry spaces. Witness the difference with Allseal Waterproofing.

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.

RC Roof Waterproofing at Tampines Ave Condominium

Waterproofing Works at Symbiosis Tower

Waterproofing and Exterior Painting Works at 72 Holland Road

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

Allseal Waterproofing PTE Ltd. place picture
4.6
Based on 21 reviews
Allseal waterproofing workmanship and investigation of existing building leaking very good. They have done waterproofing leaking rectification work for The American Club Singapore so far no leaking last few weeks I monitoring. Thanks, Allseal team members and workers.
Cyril Wood profile picture
Cyril Wood
2 years ago
The team at All seal were very efficient. They worked well to do the job in an awkward place. Even repainted an area affected by water damage at no extra cost. I would recommend this service.
James Lim profile picture
James Lim
2 years ago
Very good! Solved my problem which others cannot solve. Thank you! Highly recommended.
Eugene T profile picture
Eugene T
2 years ago
Engaged Allseal for my roof and RC waterproofing. The workers handled the works relatively well and were receptive to our inputs. They are responsive and returned on a few times when we noticed areas that the paint was not even. Overall, happy to recommend to ask for a quote if you are looking for good works at competitive rates.
Atik Tamim profile picture
Atik Tamim
2 years ago
You saved my structure. Thanks for your quality work.
Yong Huat Ng profile picture
Yong Huat Ng
3 years ago
Willingness to listen, give no excuses, and very committed to doing a complete job is the key characteristics and strength of this vendor. As waterproofing can be a progressive trial process. This vendor response fast to feedback and comeback quickly to complete the coverage of the fixes. I am particularly impressed with the positive attitude of the lead worker. He is friendly, attentive, welcome feedback and committed to delivering a quality work (which he did). A vendor that I am very happy with and will recommend to anyone that need to have the waterproofing services.
Joo Goh profile picture
Joo Goh
3 years ago
Am very pleased with the work done by Allseal Waterproofing Pte Ltd few months back and no further leakage or mould were detected to date. The previous contractor (Flux Solutions Pte Ltd) was very unresponsive and rude to after sales service and I decided to terminate them in favour for Allseal. I hope Allseal will continue with its responsive after sales service that I've experienced and recommend this company after the bad experience I had with Flux Solutions.

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:

Tan Wei Ming

“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

Siti Nurhaliza

“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

Kumar Raj

“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

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.

Visit Our Office

Get in touch with Singapore’s trusted waterproofing specialists. We are ready to assist you with any leakage or structural concerns.

📍
Our Location 215 Ang Mo Kio Ave 1, #01-893,
Singapore 560215
📞
Call Us +65 8360 1752
WA Chat on WhatsApp
Scroll to Top