Tip: Hydraulic cement for peace of mind
We dug out the crawl space of our first home. The seams where the foundation was under-pinned required non-shrinking grout. The first rain day after the contractor had left the basement was full of water. I ended up with hydraulic cement to fix the problem areas very fast, even setting up with moving water. I always keep some around. Use it in very small batches. Good for peace of mind.