Waterproofing & Leak Repair in KL from RM180, Bathrooms, Slabs & Balconies
Stopping inter-floor bathroom seepage, concrete slab cracks and balcony leaks across KL & Selangor, backed by up to a 180-day warranty.
- Reply within 15 minutes, 8am - 9pm
- 30 day workmanship warranty
- Price confirmed before work
- KL and Selangor, same day
Book in 30 seconds
Pick a service and area, then send a ready-made WhatsApp message. No long forms.
We reply within 15 minutes, 8am - 9pm. Send a photo of the fault for a sharper quote.
Water seeping through concrete slabs never heals on its own: what begins as faint dampness on a bedroom wall backing onto a shower or brown stalactite drips in a downstairs bathroom gradually corrodes steel rebar and ruins finishes. Yet many leaking bathrooms in Kuala Lumpur do not automatically require a noisy RM4,000 full tile hack-and-relay.
Our first step is isolating the true leak mechanism: pressurised supply pipe failure (dripping continuously even when nobody showers), failed tile grout joints and perimeter silicone gaps (seeping mainly after shower use), or structural hairline cracks through the reinforced concrete slab. Getting that diagnosis right avoids paying for the wrong cure.
For active cracks in concrete soffits, basement walls and wet-area slabs, high-pressure hydrophobic polyurethane (PU) resin injection expands deep inside micro-fissures on contact with moisture to form a dense waterproof seal. Where bathroom tiles remain solid on their bed, regrouting shower zones with two-part waterproof epoxy grout plus sanitary silicone perimeter sealing halts surface ingress cleanly without hacking.
What is included
- Systematic wet-zone inspection covering floor-trap collars, tile joints, mixer penetrations and slab cracks.
- Construction-grade waterproofing materials (hydrophobic PU resin, epoxy/polymer grout or sanitary silicone).
- Thorough degreasing, scraping and blow-drying of joints prior to application for maximum adhesion.
- Clean solvent wipe-down so surrounding porcelain or ceramic tiles stay free of resin smudges.
- Workmanship warranty up to 180 days on treated PU injection points and membrane coatings.
What is not included
- High-rise external abseiling / gondola rope-access works on condominium outer facades.
- Downstairs neighbour plaster ceiling patching and painting (can be quoted separately if needed).
- Replacement tile supply cost when opting for full-floor hacking and re-tiling.
- Unrelated future leaks caused by separate burst pressurised supply pipes.
Rates for this job
| Job | Price from | Unit | Notes |
|---|---|---|---|
| Silicone resealing (kitchen or bathroom) | RM60 | per fixture | Scrape old mouldy sealant and apply fresh sanitary-grade anti-fungal silicone. |
| Waterproofing, PU injection | RM300 | per point | High-pressure polyurethane resin injection to seal active cracks in concrete slabs. |
Prices above are labour only. Parts are quoted separately before work begins.
Get a QuoteCommon problems we fix
JMB inter-floor leakage notice because your shower seeps to the unit below
We inspect floor-trap collars, shower perimeter joints and concealed pipe pressure to match the right fix and satisfy management inspection.
Bedroom wall backing onto the shower turning damp and flaky
Shower splash penetrates unsealed mixer escutcheons and corner grout lines; we seal the wet-side ingress points before wall restoration.
Concrete car-porch slab or balcony dripping rainwater along cracks
Thermal expansion opens hairline slab cracks; we detail joints with reinforcing mesh and apply UV-resistant elastomeric roof membrane.
Black mouldy silicone around frameless shower screens leaking onto dry floors
Cheap general-purpose silicone shrinks and grows black mould; we strip it completely, degrease with alcohol and tool fresh sanitary sealant.
Wind-driven rain seeping around interior window sill corners
Perished perimeter weather-sealant lets rain track inside plaster reveals; we reseal accessible window perimeters with polyurethane sealant.
Seepage around the PVC floor-trap pipe sleeve penetration
The gap between smooth PVC pipe and concrete slab is the #1 condo leak spot; we pack and seal the collar with non-shrink waterproof plug mortar.
Preparing Your Bathroom for Waterproofing & Curing Times
When booking a no-hack shower waterproofing treatment or full silicone reseal, please stop using that shower for at least 6 to 8 hours beforehand so surface water drains away. Dry joint substrates let epoxy grouts, penetrating sealers and neutral-cure silicones bond deeply.
After application, the treated shower floor must cure dry for 12 to 24 hours before water exposure. If your home has two bathrooms, we treat one bathroom at a time so your household always retains a working toilet and shower.
For underside concrete slab PU injection, drilling 10mm packer ports creates rotary-hammer noise for roughly 30 to 45 minutes, requiring standard weekday condo work-hour clearance. Our crew masks beneath the injection line to catch any foaming resin drips and cleans the area thoroughly before payment.
Areas we cover
- Kuala Lumpur
- Cheras
- Ampang
- Setapak
- Wangsa Maju
- Kepong
- Bangsar
- Mont Kiara
- Sri Petaling
- Puchong
- Petaling Jaya
- Subang Jaya
Also covered: Sentul, Sri Hartamas, Bukit Jalil, Old Klang Road, Damansara, Shah Alam, Klang, Kajang.
Useful guides
- Ceiling Water Leak Repair in KL: Pinpointing the Source, Condo Rules & Costs
how to identify ceiling leak causes and handle condo inter-floor leaks
- 2026 Kuala Lumpur Handyman & Home Repair Price Guide: Real Market Rates
2026 waterproofing, silikon resealing and handyman price guide
Frequently asked questions
When does no-hack bathroom waterproofing work and when is full hacking necessary?
No-hack epoxy regrouting and collar sealing works well when tiles remain firmly bonded and water only enters eroded joints. If tiles sound hollow underfoot, rock loose or trap stagnant water in a saturated screed bed, hacking and laying a new cementitious membrane is the honest permanent fix.
How many PU injection points does a typical concrete ceiling crack need?
Injection packers are typically spaced 15cm to 25cm apart along an active crack or around a leaking pipe sleeve, meaning most localized bathroom leaks require 3 to 6 points. Send a photo on WhatsApp for a clear point estimate.
How long does sanitary-grade anti-fungal silicone stay clean?
With normal bathroom ventilation and gentle wiping without wire brushes, genuine sanitary-grade neutral silicone stays watertight and mould-resistant for 3 to 5 years.
Can you provide job documentation for our condo JMB inter-floor leak file?
Yes. Upon completion we issue an itemised service receipt detailing the waterproofing method performed, treated zone and warranty period for your JMB/MC management record.
Another question? Contact us or WhatsApp 012-227 3341.
Need waterproofing this week?
Message us on WhatsApp and we will confirm the price and a same-day slot. Reply within 15 minutes, 8am - 9pm.