Our Services
Injection Systems
PU and epoxy crack injection that stops active leaks immediately and restores structural continuity permanently.
Overview
How we approach it
Injection forces liquid resin deep into concrete cracks under pressure: polyurethane to stop active water leaks within minutes, epoxy to structurally rebond dormant cracks. It's the only repair method that treats a crack from the inside out.
A crack that leaks today gets worse every season — water carries salts into the concrete and corrodes the reinforcement crossing the crack. Injection is the one technique that treats the crack from the inside out, and choosing the right resin is the whole game.
For live water leaks we inject Sika® Injection polyurethane resins that react with the water itself, foaming to shut off flow within minutes — basements, tunnels, tanks and lift pits. For dormant structural cracks we inject Sikadur® low-viscosity epoxies that glue the two crack faces back into one monolithic section, restoring the original load path. Ports and marine structures around Jeddah are a large part of our injection track record.
Injection is surgical work: packer spacing, pressure control and resin selection all come from the diagnosis, not from a standard recipe.
Typical scope
- Crack mappingIdentification of live vs. dormant cracks and their cause.
- Resin selectionPU for active water, epoxy for structural rebonding.
- InjectionPackers set, resin injected under controlled pressure until refusal.
- Finish & verifyPackers removed, faces made good, water-tightness confirmed.
Related services: Concrete Repair · Underground Waterproofing
Common questions
Frequently asked questions
How do you stop an active water leak through concrete?
With polyurethane injection: we drill and set packers along the crack, then inject PU resin that reacts with the water itself, foaming and expanding to shut off the flow — often within minutes. It works on basements, tunnels, tanks and lift pits even while water is actively running.
What is the difference between PU and epoxy injection?
Polyurethane is for water: it foams on contact and seals active leaks fast. Epoxy is for structure: injected into dormant cracks, it glues the faces back into one monolithic section, restoring the original load path. Choosing wrong wastes the work — diagnosis of the crack decides the resin.
Is crack injection a permanent repair?
For the treated crack, yes — properly injected epoxy restores structural continuity, and cured PU remains flexible and watertight. What injection can't do is stop the building from creating new cracks if the underlying cause (settlement, thermal movement, overload) is active. Our diagnosis addresses cause and symptom together.