Water seepage through concrete basement walls is a common enough problem—and a serious enough one—to have created a healthy market for waterproofing paints. These products may be oil- or water-based, and they are heavier than conventional paints because they contain additives that promise to create an impermeable water barrier.
The basement has been inspected by B-Dry and they said it is a dry basement, and there is no need for any kind of waterproofing system. I am repainting the basement walls, and I have always heard that drylock, Kilz, or similar is the best kind of paint to use on concrete block walls.
Waterproofing basement walls with DRYLOK paint can be done with a 3/4″ nap roller, I got a 1 3/4″ nap roller because the walls were very bumpy in spots. The DRYLOK® I used for this project was DRYLOK® Extreme. Stir DRYLOK® very well, pour some paint in a metal tray, and start at the top of each wall.
DRYLOK® Extreme Masonry Waterproofer may be applied on a slightly damp surface, but best results are obtained when the surface is dry, clean and free of grease, oil, form-release compound, and paint. Remove dust, dirt, and any loose or broken mortar with a wire brush.
Basement Number One: The DRYLOK® Masonry Waterproofing Paint "Aha" Moment My first encounter with DRYLOK® masonry waterproofing paint was about 15 years ago. I was rehabbing an entire 100-year-old house for resale, and it was a mess from bottom to top.
Waterproof paint is fine for DIY application. You can apply it over painted surfaces, and paint over it once it's cured (1 gal./$35). Plastic sheets and panels are suitable as wall waterproofing only in combination with interior basement drainage systems. They don't stop water from getting through the wall, but they do stop it from ruining