
KL Seal Maste Waterproofing traces where the water is coming from, repairs it with our 3–5 coat system, and backs the work with a 12-month warranty. For HDB flats, condos, landed homes and commercial buildings.
Every service you need to trace, stop and make good a leak — handled by a single licensed team.
Protective systems for every wet area of your property.
Tracing and repairing leaks anywhere in your property.
Complete making-good and finishing works after waterproofing.
Before
After
The stain on your ceiling is rarely where the water gets in.

Our system builds waterproofing up in layers, up to five coats, instead of relying on one thick application. It is applied by our own trained team for long-lasting results in Kuala Lumpur homes.
Smarter sourcing and proven methods mean a stronger, longer-lasting result without the premium price.


From HDB bathrooms to condo balconies, landed roofs and commercial basements — real projects, real results.






Work with confidence — every KL Seal Maste team is verified, insured and trained to Kuala Lumpur standards.
Approved contractor registered with the Building & Construction Authority.
Licensed to work on HDB flats and common property.
Workplace safety and health management system certified.
Staff trained continuously through BCA-approved courses.
Before you pay for anything, you will know what is causing the leak, what it takes to fix it and what it will cost. The inspection is free and there is no obligation to proceed.
Warranty terms and conditions apply.
How we make sure you get the most cost-effective solution for your home in the long run.
Comes with a detailed, transparent quote setting out tasks, solution, areas included and excluded. You see the full scope before you decide.
Once the root cause is found, we recommend the most practical repair — solving the leak at its source, avoiding unnecessary work.
Our team handles surface prep, debris removal, application of the waterproofing system and a proper clean-up when done.
A leak that is patched and a leak that is solved can look the same on day one. The difference shows up months later.
| Factor | Typical quick-fix repair | KL Seal Maste Waterproofing |
|---|---|---|
| Diagnosis | Patches the visible stain or crack | Traces the leak to its source first |
| Inspection | Estimate over the phone, or chargeable visit | Free onsite inspection by a project lead |
| Quote | Lump sum with unclear scope | Itemised, transparent, with exclusions |
| Method | One product used for every job | 3–5 coat system matched to the surface |
| Scope | Stops at sealing; tiling/painting left to you | One team handles hacking, tiling, painting & debris |
| Credentials | Licences not always shown | BCA CR13, HDB licensed, bizSAFE Level 3 |
| After the job | No written warranty | 12 months warranty (T&C apply) |
“We have engaged them for our master bathroom water leakage problems that is already leaking to our neighbour unit below. They came for inspection within short period of notification. Inspection was free of charges, thumbs-up!”
“I've tried many other waterproofing contractors, plumbers, whatsoever. KL Seal Maste has great experienced staff that finally solved my ceiling leakage issues.”
“Friendly and experienced staff! Their team is very responsive and they are truthful in their quotation.”
“Highly professional. Reasonable rates. Their workmanship is of good quality.”
Rated 5.0 on Google — trusted by hundreds of HDB, condo and landed property owners across Kuala Lumpur.
Different properties leak in different places. This is who we work with and what we usually fix for them.
Ceiling leaks from the flat above, bathroom re-waterproofing during renovation, and damp walls. HDB-licensed, with non-hacking options.
Inter-floor leaks between units, balconies and planter boxes, plus roofs and common areas for the estate.
Flat roofs and roof terraces, basements, external walls and swimming pools.
Kitchen floors that stay wet all day, floor traps, and leaks into the unit below.
Ceiling leaks over work areas and shopfronts, seepage at windows and walls, toilet leaks.
Roofs, basements, pipe shafts and refuse chambers across commercial and industrial sites.
Office: No. 18 Sin Ming Lane, Midview City #06-23, Kuala Lumpur 573960
Email: info@KL Seal Maste.com.sg

Leave your details and we will arrange your free onsite inspection.
Read up before you engage anyone. These guides explain the causes, the options and what to ask a contractor.
We work in three areas: waterproofing (bathrooms, balconies, roofs, basements, floors and swimming pools), water leakage repair (ceiling, wall, roof, pipe and toilet leaks) and supporting works such as tiling, painting, PU grouting injection, water pressure testing, demolition and epoxy flakes flooring. We serve HDB flats, condominiums, private and landed homes, and commercial and industrial properties across Kuala Lumpur.
The price depends mostly on how big the area is, whether tiles need to be hacked, and which waterproofing system the surface needs. Two bathrooms of the same size can cost very differently if one needs hacking and retiling and the other can be treated without hacking.
| Factor | Why it changes the price |
|---|---|
| Size of the area | Material and labour scale with floor area, walls, kerbs and corners. |
| Hacking or non-hacking | Hacking adds demolition, debris disposal, screeding and new tiles. |
| Waterproofing system | Cementitious, liquid applied, torch-on membrane and PU injection differ in cost and coats. |
| Condition of surface | Cracks or a failed membrane must be repaired before new coating. |
| Location & access | Roofs and high areas may need scaffolding; basements resist ground pressure. |
| Property type | HDB, condo, landed and commercial sites have different requirements. |
| Making-good works | Retiling, repainting and ceiling repairs after waterproofing. |
| Testing | Ponding and water pressure tests confirm the area is watertight. |
This is why we quote after a free onsite inspection, not over the phone.
Plumbing deals with water inside pipes and fittings. Waterproofing deals with water passing through floors, walls and roofs. A plumber fixes a leaking pipe; a waterproofing contractor stops water seeping through the structure.
| Plumbing | Waterproofing | |
|---|---|---|
| What it deals with | Pipes, taps, valves, cisterns, drains | Floors, walls, roofs, joints, penetrations |
| Typical signs | Dripping tap, burst pipe, choked drain | Ceiling stains, damp walls, leaks after rain |
| When it shows | Constantly, or when a tap runs | After showers, washing or rain |
| Typical fix | Replace or reseal pipe, fitting, valve | Membrane, PU injection, sealing cracks |
| Who to call | A licensed plumber | A waterproofing contractor |
Look at where the water shows up and when. The pattern usually points to the cause.
| What you see | Likely cause |
|---|---|
| Stain under a bathroom | Failed bathroom waterproofing or a pipe leak |
| Leak only after heavy rain | Roof, external wall or window joints |
| Damp, peeling paint on a wall | Seepage through the wall or wet area behind it |
| Water around toilet / floor trap | Worn seal or failed membrane around outlet |
| Renovating a wet area | Old membrane removed with the tiles |
Not always. Where the tiles and screed are still sound, our non-hacking waterproofing treats the area over the existing surface — less dust, less noise and a shorter job. Hacking is needed when tiles are hollow or cracked, the screed is soaked, or the old membrane has failed. We will tell you which applies after the inspection.
For inter-floor leaks in HDB flats, HDB's position is that the upper and lower floor flat owners are jointly responsible for the repair. In condominiums, the leak is generally presumed to come from the unit above, and the MCST may be involved if common property is affected. It helps to have a clear inspection report before speaking to your neighbour.
It depends on the area and method. A non-hacking treatment is quickest. A job with hacking takes longer because it adds demolition, screeding, curing between coats, a ponding test and retiling. Your quote states the expected duration and when the area can be used again.
Completed waterproofing works come with a 12-month warranty (terms and conditions apply). Covered areas are written into your quote, so there is no doubt later about what is included.
Yes. A project lead visits, assesses the affected area and gives you a detailed quote at no charge. There is no obligation to proceed. To arrange one, send the enquiry form or WhatsApp +65 8668 2282.
A sealant can hold back a small, obvious gap for a while. It does not fix a failed membrane or a leak that enters somewhere else, and it can hide the problem until the damage is larger. Finding the true source takes experience and the right tests.