Zinsser® WaterTite® LX Ultra Mold Mildew-Proof Waterproofing Paint is a multi-purpose, latex-based, concrete and masonry, waterproofing paint and finish. It is designed to waterproof interior and exterior concrete, stucco, cement, cinder block and other masonry surfaces. WaterTite® LX is an excellent block filler for use in car washes and garages and is ideal for use on basement and cellar walls, cast-in-place concrete, fountains, reflecting pools, planters, canals, retaining walls, privacy fences and more.