Injection & Pressure Grouting
High-pressure PU injection that seals active leaks from the inside — for cracks in walls, slabs, basements and retaining structures where you cannot reach the outside face.
Stop active, hard-to-reach leaks at the source
When water is actively seeping through a crack — in a basement wall, a slab or a retaining structure — pressure grouting injects polyurethane resin directly into the crack. The resin reacts with water and expands, filling the void and sealing the leak permanently from the inside.
It is the go-to solution where the external face is buried or inaccessible, and where surface treatments alone would never hold.
When injection grouting is the answer
- Active water seepageWater visibly tracking through a crack
- Basement & retaining wallsNo access to the external face
- Cracked slabs & construction jointsLeaks along structural joints
- Lift pits & tunnelsBelow-ground water ingress under pressure
Four stages, done right
Diagnosis
Locate the crack path and water source; mark injection points.
Port Installation
Fit injection packers along the crack at set intervals.
PU Injection
Inject polyurethane resin under pressure until the void is filled.
Finishing & Test
Remove packers, make good the surface and confirm the leak is stopped.
System at a glance
| Best for | Active leaks in walls, slabs, basements, lift pits |
|---|---|
| Material | Hydrophilic / hydrophobic polyurethane resin |
| Access | Seals from the inside — no external excavation |
| Action | Resin expands on contact with water to fill voids |
| Install time | Often completed within 1–2 days per area |
| Warranty | Written workmanship warranty, terms by scope |
Backed in writing
Every project includes a written workmanship warranty and a free photo report before any work begins — so you know exactly what you are paying for.
Injection & Grouting FAQ
Can you fix a leak without digging outside?
Yes — that is exactly what injection grouting is for. We seal the crack from the inside, so there is no need to excavate the external face.
Does it work on active, wet leaks?
Yes. The PU resin reacts with water and expands to fill the void — active water actually helps it cure and seal.
Is it permanent?
For the injected crack, yes. If the structure develops new cracks elsewhere, those would be treated separately — we assess the whole area first.
How long does it take?
Most areas are completed within one to two days depending on the number and length of cracks.
Is the inspection free?
Yes — free inspection with a full photo report, no obligation.
Get a free site inspection & quote
Tell us about your building. Our technical team responds within 24 hours with next steps.
- Free on-site diagnosis with full photo report
- No-obligation, itemised quotation
- Written warranty of up to 10 years
- 30+ years protecting Malaysian buildings