Reliable Backfilling and Sealing for Pipe Jacking and Microtunneling.

In pipe jacking and microtunneling, the secure backfilling of the annular space between the utility pipe and the surrounding soil is crucial for the storage, sealing, and durability of the entire system. Different injection systems are used depending on the geotechnical conditions:
Larger cavities or permeable soils: fast-reacting, highly expanding silicate resin WILLKAT^® Foam. Due to its high foam factor, it reliably fills larger cavities and ensures a stable, dense backfill. Fine-pored, water-bearing soils: low-viscosity acrylate gels such as WILLGEL^® PRO or WILLGEL^® SWIFT. They penetrate deeply and enable reliable sealing even with low permeability.