| abstract |
In the present invention there is described a method, using polyurethane, for sealing off points through which water enters geological rock formations. The method utilizes an isocyanate component (a) and a polyol component (b), to be intimately mixed in a static mixer, whereby auxiliary substances and additives are added to the component (a) and/or (b) and the mixture obtained in such a manner that is then introduced under pressure into the rock formation through boreholes or injection lances, whereby 6 to 10 percent by weight of amines are added to the polyol component (b). |