Drylok Latex Base Masonry Waterproofer Paint
I like what they say about this product. Instead of giving specifications about water pressure, the manufacturer just says, guaranteed to stop water. Spec wise, it will withstand the pressure of a 22 foot column of water. Thats about 9.5 PSI. Theyve brought things down to the basics with that statement, just stopping water. Not only that, but it carries a ten year warranty. This is a waterborne paint for easy cleanup. Available in several different colors.