Rust-Oleum Triple Thick Roof Patch & Sealer patches and repairs a variety of roofing substrates to stop leaks in minutes. The highly UV-resistant acrylic formulation provides a water-tight, flexible seal that prevents moisture penetration and corrosion for a long-lasting repair. The high-build formulation is 3 times thicker than Rust-Oleum leakseal aerosol products, making it ideal for patching larger roof splits, cracks and tears. Promote adhesion for longer lasting repairs.