What to use to waterproof outside below grade basement wall.?

My new home has new concrete block that is sweating eye level from the inside. I dug up the outside a few feet down and noticed the problem. They started to tar ( it looks like ) about 2 feet below the ground. So right where they started to waterproof is where I have most of the sweating and wet spot on my block on the inside walls. My question is what should I use to fix the outside. I never did this before. Should I parge and tar from where they left off all the way up? Or is there some other product I can put on the wall? If I parge, what kind of concrete mix do I use? what kind of tar?