Problem with slab!

My wife recently noticed what appeared to be some sort of mold on our dining room floor up against one wall. After taking the floor molding off, I noticed that the sheetrock appeared to have been wet at one time. After cutting out the sheetrock about a foot off the ground, I think I found the problem. Around 20 years ago I added onto my house and it was at this wall where the new slab was poured up against the old slab. Problem seems to be that over the years a small crack has developed between the 2 slabs allowing moisture to come up from the ground. What do I need to use to pour into this crack to fix the problem? I was thinking about a liquid type of cement sort of like the self leveling cement. Please help me.

http://www.sikaconstruction.com/tds-cpd-Sikaflex1CSL-us.pdf

Sikaflex - 1c SL

And I like the fact that it's jet fuel resistant.

Rancher

You never know when some yahoo will start scrapping together an F-15 in the basement.

Tom

F15

And you can bet that it will only be after it is complete that he realizes he only has a 36" door to get out of the basement.