PU Injection Singapore
Targeted resin injection to address active leakage through suitable concrete cracks and construction joints.
Overview
Polyurethane (PU) injection is a localized water-stopping technique used where water is traveling through cracks, construction joints, or voids in concrete. The resin reacts and expands within the leakage path. Suitability depends on crack behavior, access, water pressure, and the surrounding structure, so professional diagnosis remains essential.
Problems We Solve
Injection Methods
The appropriate method is selected only after the affected area, access constraints, and probable failure mechanism have been considered.
01. Crack-Line Injection
Targeted PathPackers are arranged along suitable concrete cracks to introduce resin directly into the active water path.
02. Joint Injection
Construction JointsTargeted injection may be used at leaking construction joints where the joint geometry and condition allow.
03. Localized Void Filling
Structural VoidsControlled resin placement can help fill accessible local voids associated with leakage, subject to diagnosis.
How We Deliver PU Injection
Leak Mapping
Trace the active path, crack alignment, and accessible work face.
Packer Installation
Drill and install injection points at a spacing suited to the condition.
Controlled Injection
Introduce resin progressively while observing pressure and material travel.
Finishing Review
Remove packers, make good points, and monitor the treated area.
Key Benefits
- Localised treatment with limited opening-up
- Useful where external access is restricted
- Controlled delivery into selected leakage paths
- Can be applied to active water ingress
- Works alongside broader rectification where needed
Property Types & Applications
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FAQs
Does PU injection stop every type of leak? +
No. It is intended for suitable concrete cracks, joints, and leakage paths. Leaks caused by roof membranes, façade joints, pipes or widespread defects need a different or combined solution.
Can it be done from inside the building? +
Yes, negative-side waterproofing via injection is frequently performed internally where exterior excavation or access is restricted.
Is the area immediately dry after injection? +
The active path is sealed instantly upon reaction, but residual moisture trapped deep inside the concrete matrix may take time to completely dry out.
Need an assessment?
Send photos or arrange a site visit so the visible symptoms and likely source can be reviewed.
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