As a certified concrete injection contractor with over 20 years across Saudi Arabia and Egypt, OSISCO delivers PU resin injection, structural epoxy repair, and cementitious grouting — sealing active leaks, stabilizing soil, and restoring structural integrity without excavation.
Explore each system — engineered for site conditions, substrate type, and performance requirements.
Structural repair and waterproofing for concrete cracks
External waterproofing barrier for basements and substructures
Stop active water inflow in underground structures
Strengthen weak or water-saturated soil before and after construction
Inject cracks and voids in masonry and load-bearing walls
Re-injectable hoses for cracks and construction joints
Raise and level sunken concrete slabs without demolition
Every structure presents a different challenge — active water ingress through a concrete wall crack, voids behind tunnel linings, or soil loss under foundations. As a structural injection company and trusted concrete injection contractor, OSISCO specifies packer injection methods and low-viscosity resins tailored to your site’s exact leakage, movement, and load conditions.
| Site Condition | Recommended Injection System |
|---|---|
| Active leaks & wet cracks | Hydrophobic PU foam / hydrophilic polyurethane resin |
| Dry structural cracks | Two-component epoxy resin injection |
| Behind-wall / inaccessible face | Acrylic gel injection — curtain injection |
| Soil voids, slabs & foundations | Microfine cement grout / cementitious grouting |
| Potable water structures | NSF/ANSI 61 certified resin systems |
PU resin injection: Flexible polyurethane resin for sealing moving cracks and active leaks — including expansive polyurethane that reacts with water to form a durable seal. Hydrophobic PU foam stops gushing water; hydrophilic resin absorbs moisture to cure in damp conditions.
Koster PU gel & hydro-active systems: Proven acrylic-compatible gels for curtain injection and complex detailing where a low-viscosity resin must penetrate fine fissures behind linings.
Two-component epoxy resin: High-strength structural injection for dry, dormant cracks in columns, beams, and slabs — restoring monolithic behaviour and load transfer.
Acrylic gel injection: Acrylate gel and polyacrylic resin systems for curtain injection, construction joints, and fine crack networks — ideal when flexibility and deep penetration are required simultaneously.
Microfine cement grout: Penetrates fine voids in soil and rock for soil stabilization, tunnel consolidation, and foundation void filling.
Cementitious grouting: Structural slab lifting, grouting hoses, and masonry injection using engineered grout mixes for permanent bearing restoration.
| Property / Feature | PU Resin Injection | Epoxy Resin Injection |
|---|---|---|
| Best For | Active leaks, wet cracks, moving joints | Dry structural cracks requiring load restoration |
| Water Reaction | Hydrophobic foam / hydrophilic cure in damp conditions | Requires dry or controlled substrate for full bond |
| Flexibility | Accommodates structural movement and thermal cycles | Rigid — restores structural stiffness |
| Typical Use | Basement walls, tanks, tunnels, construction joints | Columns, beams, slabs, post-tension repairs |
Packer injection method for horizontal, vertical, and overhead cracks — how to stop water ingress through a concrete wall crack without excavation. OSISCO selects which resin to use for an actively leaking crack based on width, flow rate, and structural demand.
Curtain injection creates a continuous gel or PU barrier behind basements, tunnels, and retaining walls when external access is impossible — including injection method statement preparation for construction joints.
Injection grouting contractor services for soil consolidation, void filling under slabs, and slab lifting without demolition — using microfine cement and expansive polyurethane where appropriate.
Water inrush prevention, injection into masonry, grouting hoses, and heavy civil injection for tunnels, metro, bridges, and hydraulic structures under dynamic loading.
OSISCO is a certified concrete injection contractor and approved applicator for leading injection manufacturers:
Your questions, our answers
Concrete injection is the controlled placement of resin or grout under pressure into cracks, joints, voids, or soil behind concrete and masonry. A qualified concrete injection contractor is needed when structures show active water leaks, dormant cracks threatening durability, voids behind linings, soil loss, construction joint failure, or when permanent sealing is required without excavation.
Polyurethane resin injection is flexible, can react with water, and suits active leaks and moving cracks — ideal for PU resin injection for leaking basement walls. Two-component epoxy resin is rigid and restores structural load transfer in dry, dormant structural cracks. OSISCO engineers specify based on moisture, crack width, and load requirements.
Yes. Hydrophobic PU foam, hydrophilic resin, and hydro-active polyurethane systems are engineered for injection grouting under active water flow — including walls under hydrostatic pressure and construction joints.
Localized crack injection often completes within hours. Curtain injection, large infrastructure, or multi-level basements may require several days. Most single-crack repairs allow return to service within 24 hours after cure.
Cost depends on crack length, access, resin type, and whether the scope is waterproofing or structural. OSISCO provides site-specific quotations after a free assessment — contact our KSA team for injection grouting for foundation water leakage cost guidance.
Pricing varies by project scale, depth, and resin specification. A free site visit allows OSISCO engineers to scope PU resin injection or epoxy repair accurately for Egypt projects.
When correctly specified and executed with certified low-viscosity resin or cementitious grout, injection repairs typically deliver 15–25+ years of performance, aligned with manufacturer warranties and documented QA.
Curtain injection creates a continuous resin barrier behind a wall or lining by drilling a pattern of packers and injecting acrylic gel or polyurethane behind the structure. It is used when external waterproofing is inaccessible — basements, tunnels, retaining walls, and underground car parks.
Selection depends on crack type, width, and moisture. Sika Injection-101/201 ranges cover PU and epoxy options. OSISCO, as a Sika Injection-201 CE applicator, diagnoses site conditions and specifies the correct product and injection method statement for a construction joint or crack.
For many below-grade leaks, injection is faster, less disruptive, and more cost-effective than full excavation. OSISCO engineers compare both options during assessment and recommend the most durable solution for your asset.
Often yes. Negative-side or positive-side injection with NSF/ANSI 61 certified resin can seal leaks in potable water structures while minimizing downtime and avoiding full tank drainage.
Common causes include shrinkage, thermal movement, overload, corrosion-induced expansion, settlement, and construction defects. Early injection prevents water and chloride ingress that accelerates reinforcement corrosion.
Not always structurally critical alone, but hairline cracks can allow water and chloride ingress leading to reinforcement corrosion over time. Monitoring and timely injection prevent escalation.
Slab lifting (slab jacking) injects cementitious grout or expansive polyurethane under sunken slabs to raise and relevel floors without demolition — restoring bearing capacity and drainage falls.
Yes, when specified correctly. OSISCO uses NSF/ANSI 61 certified resin and approved cementitious grout systems for structures in contact with potable water.
Our engineers respond within 24 hours. Free site assessment included.
Our engineering team responds within 24 hours.
Free site assessment for all new inquiries.