PU Injection for Water Leakage
Introduction
PU injection for water leakage is one of the most effective solutions for stopping active leaks in concrete structures.
Water leakage in concrete structures is not just a minor issue — it is a serious problem that can lead to structural damage, reinforcement corrosion, and costly repairs.
Across Saudi Arabia, many engineers and property owners face recurring leakage in basements, tunnels, and underground structures. The common mistake is treating the symptom instead of solving the root cause.
If you have already tried patching or surface waterproofing and the leak keeps returning, the issue is not the material — it is the method.
PU injection for water leakage is considered one of the most effective and permanent solutions.
Why Water Leakage Happens in Concrete Structures
Concrete is strong but not fully waterproof. Over time, water finds its way through weak points such as:
- Structural and shrinkage cracks
- Construction joints and cold joints
- Hydrostatic pressure in underground structures
- Settlement and structural movement
- Failed waterproofing systems
In cities like Riyadh and Jeddah, groundwater pressure makes leakage a continuous challenge if not treated correctly.
Most surface treatments only cover the problem, while injection treats the source.
What is PU Injection?
PU (Polyurethane) injection is a specialized method used to stop active water leakage in concrete cracks and joints.
A low-viscosity resin is injected under pressure into the crack. When it reacts with water, it expands and forms a watertight seal inside the concrete.
This means the problem is solved internally, not just on the surface.
How PU Injection Works :
Step 1 — Inspection and Assessment
The crack is evaluated based on width, depth, and water activity.
Step 2 — Packer Installation
Injection packers are installed along the crack.
Step 3 — Injection Process
Polyurethane resin is injected under controlled pressure.
Step 4 — Expansion and Sealing
The material reacts with water and expands to fill all voids.
Step 5 — Final Verification
Leakage is stopped, packers are removed, and the surface is finished if needed.
PU Injection for Water Leakage in Concrete Structures
Where is PU Injection Used?
PU injection is widely used in:
- Basements
- Tunnels and infrastructure
- Water tanks and reservoirs
- Retaining walls
- Elevator pits
- Parking structures
- Sewage and utility systems
It is especially effective for basement leakage where excavation is not practical.
How to Stop Basement Water Leakage in Saudi Arabia
Basement leakage is one of the most common issues due to hydrostatic pressure and failed membranes.
PU injection provides a non-destructive solution that seals cracks from inside without excavation.
This makes it ideal for operational buildings and existing structures.
Why PU Injection Works Better Than Other Methods
- Stops active water leakage immediately
- Works in wet and flowing water conditions
- Expands to fill micro-cracks and voids
- Flexible and accommodates movement
- No excavation required
- Fast application with minimal disruption
- Long-term durable solution
PU Injection vs Epoxy Injection
PU Injection
- Used for water leakage
- Works in wet conditions
- Expands and seals cracks
- Flexible
Epoxy Injection
- Used for structural repair
- Requires dry cracks
- Rigid
- Restores structural strength
Why Choose OSISCO
OSISCO is a specialized applicator with over 15 years of experience in Saudi Arabia.
We provide:
- Professional PU injection services
- Approved applicator status
- Experience in infrastructure and water-related projects
- Detailed crack assessment and root cause analysis
- High-quality materials (Sika, Mapei, TPH)
We focus on solving the problem, not just covering it.
Contact Us
If you are facing water leakage in your structure, delaying the repair will increase damage and cost.
OSISCO provides fast and reliable PU injection services across Saudi Arabia.
Contact us today for inspection and a permanent solution.
