High-Pressure Polyurethane (PU) Injection Grouting
Non-destructive remedial waterproofing technology capable of stopping active, pressurized water ingress through concrete cold joints, honeycomb fissures, and retaining wall seams within 90 seconds.
How Hydrophobic PU Resin Shuts Off Active Water Ingress
Standard cementitious slurries wash away immediately when injected against active water pressure. Our specialized solvent-free hydrophobic polyurethane prepolymers react spontaneously with the intruding water, expanding into a dense, closed-cell rubbery matrix up to 20 times its liquid volume.
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5-Stage On-Site Execution Protocol
Crack Mapping
Identify fracture line and trace source of active hydrostatic pressure.
45° Staggered Holes
Drill rotary hammer holes alternating on both sides to intersect crack at center.
Mechanical Anchors
Install steel injection packers with high-pressure one-way zerk valves.
Piston Pumping
Inject PU resin until pure expanded foam extrudes from the adjacent packer.
Packer Knock-off
Remove packers and seal drill holes flush with fast-setting hydraulic mortar.
What this division carries out
Other Service Divisions
Waterproofing Services (Basements, Roofs & Podiums)
Turnkey installation of multi-layer below-grade tanking systems using APP/SBS modified bituminous membranes, pre-applied HDPE waterproofing, and crystalline coatings designed to resist hydrostatic heads exceeding 30 meters.
Construction-Related Services & CFRP Retrofits
Structural capacity upgrades for overloaded columns and distressed beams using Carbon Fiber Reinforced Polymer (CFRP) fabric wrapping, micro-concrete encasement, heavy-duty industrial epoxy screeds, and expansion joint elastomeric bridge profiles.
Product Consultation & Chemical Specification
Our qualified materials engineers review tender specifications, soil bore reports, and concrete mix designs to prescribe the optimal balance of plasticizers, silica fumes, and membrane chemistries that prevent chemical over-expenditure while ensuring total structural protection.
Technical Assistance & On-Site QA Supervision
Even the best chemical formulations fail if improperly applied. Rajguru provides on-site application engineers who calibrate surface preparation, verify substrate moisture levels (RH < 4%), conduct pull-off tensile adhesion tests, and train your workforce in torch-on seam welding.
Project-Based Services & MoRTH Road Markings
Turnkey execution of automated thermoplastic road markings conforming strictly to MoRTH Section 803, highway retro-reflective signboard fabrications, expansion joint sealing on bridges, and acoustic barrier installations for highway and expressway projects.