🔧 Sub Service — Waterproofing

Crack Injection Services
in Sri Lanka

Permanent repair for structural and leaking cracks in concrete. Our expert crack injection solutions cover concrete walls, slabs, basements, beams and columns — restoring structural integrity and stopping water infiltration in one treatment.

PU Injection Epoxy Injection Structural Cracks Leaking Cracks

Service Overview

Expert Concrete Crack Injection
Services in Sri Lanka

Looking for crack injection services in Sri Lanka? We offer top-notch structural and waterproof crack injection solutions. Our services cover concrete walls, slabs, basements, beams, columns and foundations — providing permanent repair for all crack types.

Cracks in concrete structures are not merely aesthetic problems — they are pathways for water, chlorides and carbonation to penetrate the structure, corroding reinforcement bars and causing progressive structural deterioration. In Sri Lanka's coastal and humid environment, crack repair is often urgent.

Our crack injection technique involves pumping specially formulated resin under controlled pressure through strategically placed injection ports directly into the crack. This fills the entire crack width — from surface to base — bonding the concrete back together and creating a watertight seal.

Types of Crack Injection

Two Main Systems
We Use

🔴 PU (Polyurethane) Injection

Best for active, leaking cracks — especially in water-bearing structures. PU resin expands on contact with water, aggressively filling and sealing the crack. Remains flexible after curing — ideal for structures subject to movement or vibration.

Active water-leaking cracks in basements and retaining walls
Cracks in swimming pools and water tanks
Expansion joints and movement cracks

🔵 Epoxy Injection

Best for dry structural cracks requiring restoration of the original load-bearing capacity. Epoxy resin bonds with extremely high tensile and compressive strength — actually stronger than the parent concrete.

Structural cracks in beams, columns and load-bearing walls
Cracks in bridge decks and elevated slabs
Fine hairline cracks requiring restoration of monolithic strength

Applications

Where We Perform
Crack Injection

🧱

Concrete Walls

Both structural and non-structural wall cracks — vertical, horizontal and diagonal crack patterns.

🏗️

Slabs & Decks

Floor slabs, roof decks, podium slabs and bridge decks — stopping water from penetrating below.

🏠

Basements

Underground walls and basement floors with active water infiltration through cracks.

🏛️

Beams & Columns

Structural member repair — restoring full design load capacity of cracked structural elements.

🏊

Pools & Tanks

Swimming pool shells, water storage tanks and retention structures with active leaks.

🌉

Bridges & Infrastructure

Bridge piers, abutments and deck slabs — we have worked on government infrastructure projects island-wide.

Our Process

The Crack Injection Process
Step by Step

Crack Survey & Assessment

We map all cracks, measure their width and depth, determine whether they are active or dormant, and select the appropriate injection resin and technique.

Surface Preparation & Port Installation

The crack surface is cleaned and injection ports (packers) are installed at regular intervals along the crack length — typically every 150–300mm depending on crack width.

Resin Injection Under Pressure

The selected resin (PU or Epoxy) is pumped under controlled pressure through each packer, progressing along the crack until the resin exits the adjacent port — confirming the crack is fully filled.

Port Removal & Surface Finishing

Once cured, the injection ports are removed and the surface is finished flush with appropriate repair mortar.

Waterproofing Coat (if required)

Where the repaired area is exposed to ongoing water pressure, we apply a compatible waterproofing system over the repaired crack to provide additional long-term protection.

Common Questions

Crack Injection FAQs

Which is better — PU or Epoxy injection?▼

It depends entirely on the crack type. PU injection is best for active leaking cracks — it expands with moisture and seals water pathways. Epoxy is best for dry structural cracks where restoring the original strength of the concrete is the priority. Our specialist will assess each crack and recommend the correct system after the site inspection.

Will the crack come back after injection?▼

If the underlying cause of the crack (e.g. foundation movement, thermal expansion, structural overloading) is not addressed, new cracks may form adjacent to the repaired area. For movement cracks, we use flexible PU resin that accommodates ongoing movement. For structural cracks, we advise on any required structural remediation alongside the injection repair.

How thin can a crack be to still be injected?▼

With our specialised ultra-low viscosity Epoxy resins, we can successfully inject cracks as fine as 0.1mm wide. For PU foam injection, the crack should ideally be at least 0.3mm wide and have some moisture present to trigger the expansion reaction.

Have Cracks That Need Repair?

Our certified specialist will assess your cracks and recommend the right injection system — free site visit, no obligation.

🛡️ Free Crack Assessment 📞 +94 777 887 307 💬 WhatsApp

Crack Injection Servicesin Sri Lanka

Expert Concrete Crack InjectionServices in Sri Lanka

Two Main SystemsWe Use

Where We PerformCrack Injection

The Crack Injection ProcessStep by Step