Rust-Oleum Triple Thick Roof Patch and 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 ideal for patching larger roof splits, cracks and tears. For best results, combine usage with the Rust-Oleum Roof Patch Cleaner and Primer (sold separately) to prep surface and promote adhesion for longer lasting repairs.