Knowledge · Injection

Is injection resin safe for the soil and groundwater?

A question we get a lot: what does that resin do in my garden, under my house, in the groundwater? In short: the resin we use is made to stay in the ground. These are the facts.

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Sample of cured expanding resin

The facts

Our expanding resin
CompositionTwo-component polyurethane, expanding
CFCs and formaldehydeFree of CFCs and formaldehyde
GroundwaterPermitted in water catchment areas
After curingInert: does not dissolve or break down
WeightAbout 85 kg/m³, hardly any extra load
Curing90% of final strength after about 15 minutes
Warranty30 years

What happens during injection

The two components are only mixed in the injection lance. In the ground the resin expands within seconds to about 30 times its volume and cures into a solid, closed mass. It fills voids and compresses the ground. After that nothing changes: the resin stays in place.

Working safely

  • We request the location of cables and pipes beforehand
  • The injection unit stays outside; only the hoses come in
  • We inject point by point, under continuous laser measurement
  • No concrete, cement or spoil is involved

With serious damage, have a structural engineer assess the situation. Soiltek is a specialist contractor: we record, measure, propose a technique and carry out the repair, in consultation with your engineer.

What can we do?

Deep Lift

Expanding resin strengthens the ground under the foundation, without digging.

Slab Lift

Sunken concrete floors back to level.

Frequently asked questions

Is it allowed in a water catchment area?

Yes. The resin is permitted in water catchment areas.

Does any soil or waste have to go?

No. No concrete, cement or spoil is involved. We only drill small holes and seal them afterwards.

How long does the resin last?

The resin is inert and does not break down. We give a 30-year warranty on the resin.

Not sure?

Send us a few photos of the cracks and the surroundings of your house. We will look, with no obligation, at what may be going on.

Report your cracks

Read also: In which soils does resin injection work? · Lifting a subsided industrial floor without shutting down your operation · Strengthening the foundation before you renovate or build up