[Raven]

theres some grey caulking made especially for adhering to cement at the home depot... but the problem is being created outside your foundation. the water damage thing is an obvious problem but when your walls start growing mold on the backside of your sheet rock the house becomes unlivable and a danger to your life. So my point being , don't try the quick fix here....better to over kill it and quickly.

if it were my house, I'd dig the soil around the foundation away and put grey caulking on the outside of that crack covered by peel and stick ice dam barrier for roof edges there...and bullet proof it... then i'd install a ventilated black poly pipe in a gravel swale to wisk that water away forever to a lower than the crack -> direction.

also it's a good idea ...when it's pouring outside to throw on your rain gear (take your time here) and stand back and watch exactly how the yard and roof is handling the run off.... and where its going or coming from.