During a major rain storm while we were in the basement for tornado warnings, we noticed water seeping in from a crack on the west wall of our basement. This crack runs from top to bottom and is at the most maybe 1/8 in. gap. I've heard of some form of injecting into the crack. Could this work for me? The blocks are 12" blocks and the crack doesn't follow the joints. If so where could I buy a kit like that. The outside area is under my front porch. (wooden deck)