I am looking for the best material(s) to apply to my exterior foundation walls to waterproof them. It's an older house in the Boston suburbs w/a concrete foundation and walkout basement. There seems to be some spots where the concrete is porous, as though there were air pockets between the concrete and the forms. Instead of a sheer concrete face, I can see the small stones and air pockets in those spots. There's not many of them, but it looks like an easy way for water to get in. I have owned the house since last summer and I noticed then that my front basement wall gets some dampness/weeping after heavy rains when it was very humid. I have to correct the grade as it slopes toward the house, but since more than half of the walls are exposed, I would rather expose the entire wall and treat it before backfilling and raising the grade. This way I will feel more comfortable when I finish the basement. Thanks in advance,

David