It is going to be very hard to field apply any liquid material uniformly enough to not have any defects resulting in leaks.

Good point Brickeyee. I found another company, Conservation Technology Inc., that sells what sounds like a similar product. They are in Baltimore, less than an hour from me. I will try calling them next week and ask them about how make sure it is applied evenly.
Here is the link to the product information. http://www.conservationtechnology.com/waterproofing_acrylic.html