I've been talking to a contractor about drying up my wet basement. My house is 150 years old with a stone foundation. We have decided to dig around the outside of the foundation to put in drain tile. My contractor wants to use a product called Voltex against the foundation wall to waterproof it. When the product comes into contact with water it is suppose to swell and form a barier against water. The active ingrediant is called Bentonite.
I would like to find out if anyone else has used this product in this type of an application and what type of success/failure you may have had.