Often times additional joints are needed, thus the analysis of cracking problems is critical. Injection Preparation Proper job preparation is essential to insure maximum results. Preparation before injection is even more important. Once the resin is in the crack, there is no turning back. It is extremely important that the drilling of all ports be done with vacuum attached swivel drill chuck and hollow drill bits.
Concrete dust can be detrimental to the injection processes in several ways.
For example, any dust remaining in the drill hole near a crack can combine with the very low viscosity injection resin, forming a semi-paste. This paste can slow or even block the resin flow. Drilling very tight crack with a solid drill forces dust into the crack. This seals the crack from resin flow. Determining the spacing of ports is done by a highly experience applicator.