12 OZ, Black, Leak Seal Spray, A Rubberized Protective Utility Coating Designed To Fill & Seal Leaks & Cracks, Provides A Water Tight, Flexible Seal That Prevents Moisture Penetration, Rust & Corrosion, Great For Gutters, Roofs, Flashing, Ductwork, PVC Drains, Masonry, Concrete & Much More.