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Dealing with a 6 ft crack below ground in my concrete foundation that water comes through. It was about an eighth inch wide throughout. I had at one time thought about epoxy injection as a method to use to fix this crack, but during hurricane Sandy, I got nervous and hoped to do something to fix it in a short turnaround. In so doing I aimed to fill this crack with a cement from the inside of the house. I chiseled the crack to about 2 inches to 2 1/2 inches deep and about 3/4 to an inch wide. Having done this, I don't believe epoxy injection will be possible. I've gotten the feeling that hydraulic cement may crack and not be suitable for this purpose. I visited the local home store and learned of a product called Rapid Set Cement All. I called this company. They recommend this product for the use I've explained. I have several problems with moving forward. First, they suggest I use an angle grinder to cut an inverted "V" in the crack. I had used an air chisel. They told me that could cause more damage- not recommended. They tell me there are angle grinders with vacuum attachments made to capture the dust. I know this dust is hazardous, I have a mask, but I want to do the best I can to eliminate it from being kicked up in the house. I have an angle grinder, but it has no such attachment. I'm hoping that this forum can help me sort out the best method to use moving forward and the remaining issues.