Listen to Rodney he is on the right track. Water leaks come from the outside of your house and that is where the repair needs to be made. In all of my years I have never repaired a basement leak from the inside of a house, and I could have sold alot of expensive equipment to do so. I have found that over 90% of basement leaks were caused by poor drainage. All of the land around your house should slope away from your house at least a 1/4 inch per foot. You can verify this with a 4 foot level and ruler. Two other causes of basement leaks are bad gutters and broken storm sewer lines. What these people are trying to sell you are bandaids. They are simply masking the problem. I can go into great detail into how the problem originates, but my fingers are sore. In final, solve the problem from the outside. Oh, use your existing heating system to heat the basement, it will be much cheaper than some aftermarket product.