DRYLOK Original Masonry Waterproofer is ideal when water is leaking through existing masonry or you need to protect new construction, this proprietary formula is guaranteed to stop water. Unlike ordinary paint that simply adheres to a surface and can be forced off by incoming water pressure, DRYLOK Original Masonry Waterproofer actually penetrates the pores in that surface, bonding to the masonry and creating an impenetrable barrier. Waterproof interior, exterior, above and below grade walls and more: basements, living spaces, laundry rooms, dry storage, hobby corners, fish ponds, retaining walls, bird baths, and more. Color: Gray.