A wet basement is a long-term problem, and a waste of good living space. Once you’ve made sure that your property drains properly (see Drainage products), and that your foundation is structurally sound, you’ll need Thoroseal Waterproofing & Cement Products. Unlike any other “waterproofing” paint, Thoroseal is a cement based product that becomes an integral part of your masonry wall, and keeps moisture out, period.