Why Ground Improvement Matters
At Resinject, we deliver advanced ground improvement solutions designed to strengthen and stabilise weak or variable soils beneath existing. Ground improvement plays a critical role in geotechnical engineering. Insufficient soil strength or inconsistent subsurface conditions can result in structural movement, loss of support, and serviceability issues. By enhancing the bearing capacity and promoting densification of the subsurface soils, we mitigate risks associated with differential settlement and long-term deformation. Our process also contributes to liquefaction mitigation by reducing void ratios and increasing soil stiffness, improving resilience and stability. Through applied geotechnical expertise and innovative resin technology, Resinject provides cost-effective, permanent solutions that enhance foundation reliability and extend asset life.Why RSJ170
- Australian Made Resin, with 50-Year Product Warranty
- Advanced Ground Improvement: RSJ170 resin infiltrates soils to depths exceeding 6 meters, reinforcing foundations in unstable or mixed ground conditions.
- Structural Load Optimisation: Improves the strength and density of underlying soils, enhancing their load bearing capacity. Engineered to safely elevate loads exceeding 90 tonnes/m², providing robust structural support.
- Precision Foundation Adjustment: Enables controlled and efficient lifting of structures, ensuring accurate alignment with minimal site disruption.
- Industry Compliant: Meets Transport for NSW (TfNSW) M232 Specification and fully compliant with TfNSW quality assurance specification for expanding resin slab jacking/stabilisation
- Rapid Expansion and Setting: Expands up to 40 times its initial volume and cures within 60 seconds, enabling fast, efficient soil stabilization with minimal downtime.
- Non-Invasive Application: Precisely injected beneath the structure, removing the need for excavation and enabling sites to remain fully operational throughout treatment.
How RSJ170 Strengthens Weak Ground
Our engineered polyurethane resin expands through voids and weak zones in the soil. As it reacts, it binds surrounding particles and creates a dense, composite material that improves load-bearing capacity and prevents future movement.
RSJ170 Product Details
- Australian Made & Certified
- Application Focus: Ground improvement for structures up to three storeys
- Component A: Polyether Polyol
- Component B: MDI Isocyanate
- Setting Time: 60 seconds
Material Data Sheet available on request
On-Site Injection Process
- Inject Hole Diameter: 7mm or 16mm
- Industry Leading Injection Depth: Up to 6m
- Low Impact and Non-Invasive: No digging required
- Mixed on-site via Resinject’s onboard proportional pumping system, housed in self-contained, bunded service vehicle
Engineers & Contractors
We work alongside geotechnical engineers to design site-specific injection plans, ensuring structural compliance and predictable outcomes.
RSJ170’s proven expansion rate and deep-injection capability make it ideal for engineered ground improvement and remediation works.
Applications of Australian Made RSJ170
Ground Strengthening
Modification of subsurface conditions to increase structural support and reduce susceptibility to settlement or liquefaction.Slab Lifting – We lift and re-leveling concrete slabs that have experienced settlement or subsidence problems
Subsidence
Cost effective, non-invasive solution for sinking ground
Re-levelling
We relevel buildings that have experiences subsidence, settlement or other structural issues leading to sunken foundations
Void Filling
We inject into subsurface voids or cavities to stabilise the ground by filling gaps, increasing density, and enhancing load-bearing capacity
Sector Applications & Results
Residential
Typical Applications
Remediation of sunken floors, subsiding slabs, and foundation movement in houses and apartment complexes. Effective for reactive clay soils, edge heave, and moisture-related subsidence.
Results
Floors and footings are lifted and relevelled with millimetre precision, restoring structural integrity and preventing further differential movement without the need for excavation.
Civil Infrastructure
Typical Applications
Remediation of settlement beneath roads, pavements, bridge abutments, culverts, and retaining structures. Ideal for addressing localised soft spots and maintaining grade control.
Results
Restored bearing capacity and improved uniformity of subgrade support, reducing deformation, surface cracking, and maintenance costs while extending asset service life.
Industrial
Typical Applications
Stabilisation of warehouse and factory floors, hardstands, and loading docks affected by heavy vehicle traffic or slab settlement.
Results
Subgrades are densified and strengthened to improve performance under sustained and dynamic loading, ensuring level and durable surfaces for operations.
Mining
Typical Applications
Support and stabilisation beneath conveyor footings, crusher pads, tank bases, and equipment foundations in remote or variable ground conditions.
Results
Enhanced subgrade stiffness and stability, reducing downtime, improving load distribution, and maintaining operational safety in high-load environments.
Recent Foundation Repairs we have completed
A long-term solution for your sinking floor
Resinject slab repairs always provide long-term solutions to fix your sinking floors. This is because we address the root cause of the problem: subsidence and voidage.
We use high-quality chemical resin in house slab foundation repair to stabilise your slabs and foundations. As well as being certified to Australian standard, this resin is so tough, durable and dependable that we provide a 50-year warranty on our slab foundation repair.
If you’re looking for a long-lasting way to restore your property, our house foundation repair services offer a smarter alternative to major excavation or slab replacement.
Here’s why you should choose Resinject to repair your Foundations
Combined 100+ Years Experience
50 Year Product Warranty
Licenced
Builders
Certified Australian Resin
ISO Certified 9001, 14001, 45001
Here’s how our Foundation Repair process works
By injecting our resins, compromised soils will be consolidated and stabilised, allowing for permanent wall repair. Our approach involves:
Prepare
Our experts drill a series of tiny holes in the affected area
Inject
We inject our specially formulated Poly Urethane Resin
Expand
Our Resin fills the voids, hardens instantly which compacts the ground
Result
The area is instantly reinforced and even re-levelled if required
Check out some of our previous work
Frequently Asked Questions
Yes. While resin injection is often known for slab lifting, RSJ170 is an engineered ground-improvement system capable of deep injection up to 6 metres.
This allows us to stabilise weak soils, compact loose fill, and restore bearing capacity beneath homes, roads, and industrial floors. The result is densified soil and improved structural support – not just a temporary lift.
Yes – when injected under pressure, RSJ170 expands through weak zones and binds soil particles, increasing stiffness and bearing capacity. This densification effect can restore the strength of compromised foundations and reduce future settlement.
Your Structural Consultant will discuss this potential need with you during the free site inspection and quoting. Sinking floor piers and other circumstances might necessitate your removing furniture and fittings so that we can work inside. But in most cases, there is no need for you to vacate the property, however it is preferable to have the work area cleared prior to our arrival.
Most residential jobs are finished within a few hours. Bigger projects may take over a day; your Structural Consultant will discuss the time frame as part of the free site assessment and quote.
The cost of sinking foundation repair depends on factors like the extent of ground movement, the size of the affected area and how accessible the site is. At Resinject, we offer free site assessments and transparent pricing based on your specific requirements. Whether it’s a commercial project or a home foundation repair, our resin injection method provides a fast, effective solution that addresses the cause and minimises disruption.
Our crew work from a self-contained mobile unit. We generate our own power and bring all the tools and products required to carry out the works.
With over 100 years of combined experience, Resinject exclusively uses an Australian-engineered resin that can be injected to depths of up to 6.5 meters when needed, ensuring proper re-support is installed. We do offer a 50 year guarantee against shrinkage with our product.
Traditional underpinning can be carried out as an alternate method. However, this generally requires a lot more time on site, bigger equipment, with more disruptions and ultimately more expensive.
On arrival, our crew start by confirming the levels recorded in the initial assessment. We then employ laser equipment to monitor the lifting closely throughout the process, ensuring levelling that is precise to the millimetre.
