B-dry, and other companies stop the water from entering your basement,
by collecting the water below the the basement floor and pumping it
back out.
However, there is a company that installs a Pink Jacket to the
exterior that is guaranteed for 20 years.  And they claim this is
better because the exterior walls will stop collecting moisture. 
HELP!

Duplicate question

Iss1000,
I know the problem  - and have been trying to ignore it for years.
Here is a really good explanation and advice site which I was pleased
to discover agrees with my experience in Germany, where both methods
are also used.  Of course, each company swears its own is the best and
absolutely adequate solution.
Maybe I scanned the text to quickly, but I didn't notice its saying
much about permanent ground water, a high water table or an
underground water vein.  Just insulating the walls down to the base of
the foundation won't really fix that, whereas a drainage pipe around
the foundation will (should?) be better.

http://doityourself.com/basement/wetbasements.htm

The final remark about paying for an independent professional
consultant is good advice.  IF he knows the neighborhood, all the
better.
Good luck, Myoarin

PS.  You can find many other sites with a search for:  wet basement