Pressure Grouting (PU) Works
High-pressure injection solutions to stop active leaks, repair structural cracks, and stabilise foundations across Singapore.
Our Expertise
Advanced Injection Grouting Solutions
2hr
Response Time
6+
Waterproofing Methods
800+
Leaks Sealed
15+
Years Experience
What We Do
Types of Grouting We Provide
Polyurethane (PU) Injection Grouting
High-pressure injection of expanding polyurethane resin into cracks, joints, and voids to stop active water leaks instantly. The resin expands on contact with water, forming a flexible, waterproof seal that accommodates structural movement.
- Stops active leaks within minutes
- Flexible seal accommodates movement
- Non-toxic & environmentally safe
Epoxy Injection Grouting
Structural repair injection using high-strength epoxy resins to restore the load-bearing capacity of cracked concrete. Ideal for structural cracks in beams, columns, and slabs where both waterproofing and structural integrity are required.
- Restores structural integrity
- High compressive & tensile strength
- Bonds stronger than original concrete
Cementitious Grouting
Cement-based grout injection for filling large voids, honeycombs, and cavities in concrete structures. Used for ground consolidation, underpinning, and stabilising foundations affected by soil erosion or settlement.
- Fills large voids & cavities
- Foundation stabilisation
- Cost-effective for large areas
Techniques
Injection Techniques We Use
Low-Pressure Injection
Controlled injection at 20–50 PSI for surface cracks and cosmetic repairs. Ensures full penetration without damaging surrounding concrete.
High-Pressure Injection
Injection at 500–3,000 PSI for deep structural cracks and active water leaks. Forces resin through the full depth of the crack.
Curtain Grouting
Creating a continuous waterproof barrier behind retaining walls and basement structures by injecting grout in a systematic grid pattern.
Permeation Grouting
Injecting micro-fine grout into porous soil or rock to reduce permeability and strengthen the ground around foundations.
Crack Stitching
Combining injection grouting with stainless steel pins across cracks for maximum structural reinforcement and waterproofing.
Joint Sealing
Specialised injection of flexible resins into construction joints, expansion joints, and pipe penetrations to create watertight seals.
Where We Apply Grouting
Our injection grouting solutions cover every type of concrete structure
Basement Walls & Floors
Lift Pits & Sumps
Swimming Pool Structures
Retaining Walls
Tunnel Linings
RC Slabs & Beams
Expansion & Construction Joints
Pipe & Cable Penetrations
Water Tanks & Reservoirs
Underground Car Parks
Frequently Asked Questions
Find answers to common questions about our waterproofing and construction services.
What is pressure grouting and how does it work?
Pressure grouting involves injecting specialised resins or cementitious materials into cracks, joints, and voids under controlled pressure. The injected material fills the gap, bonds to the surrounding concrete, and creates a watertight seal. Different materials are used depending on whether the goal is waterproofing (PU), structural repair (epoxy), or void filling (cement).
How long does PU injection grouting last?
Quality PU injection grouting typically lasts 10–20 years or more. The flexible nature of polyurethane allows it to accommodate minor structural movements without cracking, making it one of the most durable waterproofing solutions for active leaks.
Can grouting be done without hacking tiles?
Yes! One of the biggest advantages of injection grouting is that it’s minimally invasive. We drill small injection ports (8–12mm) at strategic locations and inject the resin directly into the crack or void. No hacking of tiles or finishes is required.
How much does pressure grouting cost in Singapore?
Costs depend on the type of grouting, area covered, and severity of the issue. PU injection for a typical bathroom leak ranges from $500–$1,500, while large-scale basement grouting can range from $8–$20 per injection point. Contact us for a free assessment.
Is pressure grouting suitable for HDB flats?
Absolutely. PU injection grouting is one of the most popular solutions for HDB water leakage issues, especially for inter-floor leaks. It’s fast, non-invasive, and doesn’t require extensive renovation work.
Have a Leak? We Can Fix It Fast.
Get a free on-site assessment and quotation within 24 hours. Emergency leak sealing available.