Quikrete, 8800-05 Concrete & Masonry Waterproofing Sealer; 1 gal, White concrete & masonry waterproofing sealer is a water based, silane-siloxane formulation designed to waterproof and seal concrete, masonry, brick, pavers and stucco surfaces. Quikrete® waterproong sealer repels water and protects from oil, gasoline, grease, salts and uv rays without changing the appearance of the substrate.