Sealing of tunnels

Professional Tunnel Sealing Services – Lasting Waterproofing Solutions for Modern Infrastructure

Tunnels are among the most challenging structures in civil engineering built through rock, beneath rivers, or under densely populated cities. Whether constructed using TBM (Tunnel Boring Machine) systems or traditional methods, tunnels must endure harsh environmental conditions, constant hydrostatic pressure, and structural movement. Over time, these forces can lead to water infiltration, concrete degradation, corrosion of reinforcement, and ultimately, compromised structural performance.

At European Tech Co, in partnership with COVER, we offer specialized tunnel waterproofing and sealing solutions, designed to ensure long-term durability and integrity of underground infrastructure — even in the most demanding geotechnical environments.

🔧 What We Do

We provide full-service tunnel waterproofing and rehabilitation, including:

Sealing of cracks – both dry (with epoxy resins) and active leaks (with polyurethane or acrylic gels)
Injection at segment joints – sealing between prefabricated TBM tunnel rings
Repair of diaphragm walls, floor slabs, expansion joints, and tunnel portals
Curtain injection techniques for wide-area waterproofing without dismantling structures
Structural reprofiling of damaged concrete
Innovative sealing of complex gaps and transitions between tunnels

Our work spans new tunnel construction, rehabilitation, and emergency interventions for leak management.

🧪 Materials & Methods We Use

Depending on the specific condition and location, we use advanced materials and technologies, including:

Injection materials: Epoxy resins, polyurethane foams, silicate and acrylic gels
Support systems: Hydro-insulation mats, injection hoses, swelling profiles
Repair materials: PCC mortars, cement suspensions, foam concrete, shotcrete
Application techniques: Low-pressure injection, high-pressure crack injection, core drilling, curtain grouting, sealing of dilatations, and specialized profiling methods

✅ Key Advantages

Precision sealing even under high groundwater pressure
Minimal disruption to tunnel operations
Fast and reliable repair of leaks, voids, and segment connections
Use of expansive, soil-reactive resins ensures tight seals and ground stabilization
High-strength repair materials matched to the structural element's original performance
Ability to take core samples and assess subsurface conditions for complex tunneling needs
Round-the-clock execution with a trained and experienced team

🏗️ Proven Track Record

Our expertise is backed by large-scale, high-profile projects. In the Warsaw Metro construction, for example:

We’ve sealed over 130 km of tunnel segment joints
Used over 120 tons of acrylic injection gel
Installed more than 500,000 injection packers
Our injection ropes could wrap around the Earth three times
We've delivered 9500+ meters of sealing, working 24/7 with a team of 90+ skilled professionals
And our total work hours exceed 165,000 hours — and counting

🌍 Where We Work

We provide tunnel sealing and injection services both locally and internationally — for infrastructure authorities, metro projects, contractors, and utility providers.

📩 Contact us today to learn how our high-performance tunnel sealing solutions can protect your infrastructure for decades to come.