PU injection and soil stabilisation

We do the work ourselves: stopping water ingress, filling voids and making subsided ground firm again. By an Aquafin-approved and certified team, with our own crews and equipment.

Ask for advice View projects

AquafinApproved &
certified

What we inject

Joint injection and leak sealing

Leaking joints, cracks and penetrations in pipes, manholes, box culverts, basements and tanks. The resin reacts with water, expands and seals the leak.

Void filling PU grout injection

We fill voids behind pipes and manhole walls and under floor slabs, so they do not wash out further.

PU soil stabilisation

With PU resin that expands underground, we fill voids and restore the load-bearing capacity of loose soil. No demolition, and often ready for use straight away.

Subsided or hollow floor slabs in sheds, warehouses and production halls
Foundations of tanks and silos on industrial sites
Washed-out soil around pipes, manholes and culverts
Subsided driveways, terraces and basement floors

Construction and expansion joints

In concrete structures such as treatment plants, pumping stations and underground culverts.

Certified contractor

We do the work ourselves

C4Sewer received Aquafin’s certificate of approval for joint injection in man-entry pipes. We are also a certified injection specialist. The work is carried out by our own people.

Own crews and equipment
Confined-space work with our own safety watch
Fast results, even with active water ingress
No demolition or excavation needed

Crew at a manhole with tripod and fall protection

Two ways to work together

Have it done or do it yourself?

Execution

We do the work

Our own team, Aquafin-approved and certified, comes on site and carries out the injection or stabilisation in full. From diagnosis to handover.

You are here

Sales and advice

You do the work, we advise

You buy the right resins, water stops or epoxy from us, with advice from people who apply these products every day.

View products and advice

How we work

From first question to handover

Site visit and diagnosis

We assess the situation on site and review camera footage and measurements.
Advice and quotation

A clear proposal with the best-suited technique, schedule and price.
Execution

Our own crew carries out the work in line with confined-space safety rules.
Handover

Inspection of the result and a photo report of the work carried out.