New PU Injection Resin Pushes Itself Into the Crack

In summer 2019 the Belgian company Tradecc, specialized in all products regarding water sealing, tunneling and concrete repair,  expanded its product portfolio with the introduction of PC Tunnelinject 2K 6822 LV. This very low viscous, fast reacting, two-component polyurethane injection resin uses the principle of self-injection to push itself further in the crack. The resin is ideal for the consolidation of soil and water sealing of structures with high water flow or pressure, often encountered in tunneling. In wet structures it increases 8 to 10 times in volume and forms a very strong polyurethane foam. In dry structures the product forms a solid mass. When the injection resin is completely cured, PC Tunnelinject 2K 6822 LV becomes completely watertight and reinforces the treated structure.

The resin has a very low viscosity (175 mPas average at 20 °C) that seals even the finest cracks. When it reacts in a solid mass without the presence of water, it has a compression strength around 70 MPa. The strong foaming ensures that less resin needs to be injected to seal voids and cracks. And finally, the product reacts in contact with water via a pumping effect. As a result, the resin pushes itself deeper into the porous rock or concrete structure that needs to be reinforced.


Sealing water leakages with high water ingress

Soil consolidation when encountering high water flow/pressure during excavation of  shafts, tunnels, dams, canals etc.

Stabilization and water sealing of deep drill holes, porous rocks, sand, ground, brick and concrete constructions

Void filling


Related articles:

Issue 2018-03

New Joint Sealing Process for Segment Tunnels

Targeted Sealing of Leaks in Segment Linings In targeted sealing of leaks, the direct route through the joints between segment linings is used in order to drill through the gasket and inject grout on...

Issue 2010-07 New Products

New Tail Seal Grease for TBM

Condat started its lubricants activity for underground works in 1989 when it was awarded by international tender to supply the tail seal grease WR 89 for the Channel Tunnel. Since then, this product...

Issue 2012-05 Christian-Veder-Kolloquium 2012

Planning and Executing Sealing Measures in Geotechnics

27th Christian Veder Colloquium, April 12 and 13, 2012 – TU Graz, Geotechnics Group Graz. Edited by: M- Diestel, S. Kieffer, R. Marte, W. Schubert, H.F. Schweiger. 325 pp. (DIN A5) with 220 Ills....

Issue 2019-03 Sika Deutschland

Full-Area Grouting behind existing Shotcrete Layer

After more than 60 years of use, refurbishment of the road tunnel between Neuhaus and Spitzingsee bei Schliersee, Germany, was urgently necessary. The waterproofing directly behind the shotcrete inner...

Issue 2013-04 Switzerland

Renovating the Melide-Grancia Tunnel in Ticino – Injection Curtains for Sealing

The A2 motorway, the so-called Gotthard route, is one of the most important north-south transport arteries in Europe and one of Switzerland’s busiest motorways: Thousands of car and lorry drivers use...