Hello. My actual area of expertise is in electro-ceramic science. So, this question may show my lack of experience with concrete. However; I am interested if there are additives to concrete that impart some degree of waterproofing. I have done excavation work on a relative's house in a damp geographic area and essentially tarred the outside down to a one foot undercut beneath the cellar. It worked -- no more water. So, I know various coatings work. Are there additives that can be mixed into concrete prior to set that acheive the same or nearly the same effect? It seems hard to believe they would work without interferring with the concrete setting, but I have heard there are such additives. Thanks for all who are patient enough to respond.
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