Waterproofing material guide
Injection waterproofing targets active leaks through cracks, joints and penetrations without replacing a full structure, making it ideal for stopping water intrusion in walls, basements and structural elements.
Material selection guide
Injection waterproofing is a specialized technique used to stop active water leaks through cracks, joints, pipe penetrations and construction joints without demolition or structural replacement. Property owners searching for injection waterproofing, crack injection, Wall Waterproofing Dubai or Basement Waterproofing Dubai are typically dealing with ongoing water intrusion that requires immediate attention.
For UAE buildings, injection waterproofing is commonly applied to active cracks in basement walls and floors, construction joints between concrete pours, pipe penetrations through walls and slabs, expansion joints that have failed, honeycombed concrete areas, voids in structural elements and areas where water enters from behind the surface. When comparing injection waterproofing to other systems like cementitious coating or membrane systems, the selection depends on the problem type. Injection waterproofing is essential for active leaks and structural defects.
PU vs epoxy
PU injection resin reacts with water and expands into a flexible foam or gel that seals a crack even while it is actively leaking. Its flexibility tolerates minor movement, which makes it the standard choice for leaking basement walls, construction joints and lift pits.
Epoxy is a rigid, high-strength adhesive that welds a dry, stable crack back together structurally. It is used where the concern is structural integrity rather than an active leak, and only on cracks that are not moving.
Our process
We identify whether the crack is active, wet or moving, and choose PU or epoxy accordingly. Movement cracks are investigated for their structural cause.
Injection ports (packers) are drilled at an angle to intersect the crack through the concrete, spaced to give full coverage along its length.
Resin is pumped through the packers under controlled pressure until it fills the crack completely and appears at adjacent ports, confirming continuity.
Packers are removed, ports are made good, and the area is monitored to confirm the leak has stopped. A surface system such as cementitious coating may follow for full protection.
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Resin selection
Polyurethane injection resin is the default choice when water is actively running through a crack or joint. It reacts with water and expands into a flexible foam or gel that fills the void and stops the flow. Because it tolerates some movement, it is ideal for basement walls, retaining walls, lift pits and slabs that expand and contract with temperature.
Epoxy injection is used when a crack is dry and stable and the goal is to restore the structural integrity of the concrete. It bonds the two sides together with high strength and stiffness, but it will not tolerate movement. If the crack is still moving, epoxy can re-crack and the leak will return.
Some cracks need both water-stopping and structural repair. We may inject PU first to stop the active water, then use epoxy or a cementitious grout to restore strength. In other cases we inject a flexible hydrophilic resin that can swell and shrink with the crack while maintaining the seal.
Choosing the right resin depends on the crack width, whether it is active or dormant, the water pressure, the concrete condition and the location of the leak. We diagnose the crack type before drilling, so the chosen resin matches the behaviour of the structure.
After injection
After injection, the packers are removed and the ports are made good. We then monitor the area through the next rainfall or water test to confirm the leak has stopped. If the leak continues, it usually means a second crack or a different leak path was missed during inspection.
Injection stops the water path through the crack, but it does not waterproof the whole surface. On basements and tanks we often follow injection with a cementitious coating or crystalline treatment to protect the entire wall from future water ingress.
If the crack is caused by ongoing settlement or structural movement, injection alone is a temporary fix. We report the structural issue and recommend a specialist structural repair before or alongside the waterproofing work.
DryGuard.ae provides a workmanship warranty for injected cracks that are stable. The warranty covers the area injected against leaks from the same crack path. It does not cover new cracks that form due to structural movement or new damage after the repair is completed.
Service
DryGuard.ae carries out injection waterproofing for active leaks in basements, walls, lift pits, and structural slabs across the UAE. We diagnose the crack type and water source before selecting a polyurethane, epoxy, or hybrid resin.
Polyurethane resin is the standard choice for active leaks. It reacts with water and expands into a flexible seal that stops water flow even while the crack is wet. This makes it ideal for basements and lift pits where the outside is inaccessible.
Epoxy resin is used for dry, stable cracks where the goal is structural repair. It bonds the concrete back together with high strength. We assess crack movement before choosing epoxy, because rigid fills can re-crack if the structure continues to move.
After injection, we monitor the area through the next rainfall or water test to confirm the leak has stopped. We often follow injection with a cementitious coating or crystalline treatment for full surface protection.
Our warranty covers injected cracks against leaks from the same crack path. We provide a completion report and recommend further structural investigation if ongoing movement is observed.
Contact
Call +971 54 725 5271 for an injection waterproofing assessment. We diagnose the crack, water source, and substrate condition before selecting the right resin.
Our PU injection stops active leaks on the first visit, while epoxy injection restores structural strength for stable cracks.
We provide a written warranty for injected cracks and can follow up with cementitious or crystalline coating for full surface protection. We work across all UAE emirates.
Support
DryGuard.ae provides support after injection repairs, including monitoring and follow-up treatments. We check the crack after the next rainfall and can apply a cementitious or crystalline coating for full surface protection.
If a leak returns from the same crack, we return to inspect the injection and address the root cause. Our warranty covers stable cracks injected by our team.
Service guarantee
DryGuard.ae guarantees all injection waterproofing repairs with a written warranty and documented scope. Our Dubai team is available on +971 54 725 5271 for emergency support and scheduled follow-up across all emirates. We return to any leak or issue reported within the warranty period and resolve it without unnecessary delays.