Black Jack Leak Stopper Rubberized Roof Patch, 1 Gal. an excellent solution for repairing and preventing leaks on a wide variety of roof surfaces. This specially formulated rubberized roof patch provides a long-lasting repair by penetrating deep into problem areas to instantly stop roof leaks. Its effectiveness comes from Penetrex, a unique penetrating oil that reaches deep into cracks and crevices, creating a complete and durable seal. Combined with liquid rubber, this patch forms a flexible, high-performance plastic cement that delivers a superior watertight bond. This ensures that leaks are permanently sealed, ing a reliable fix for roofing issues. Suitable for use year-round, it performs well in all seasons and weather conditions. Whether you need to repair leaks in shingles, built-up roofs, SBS-modified roofs, metal roofs, or other surfaces, this versatile roof patch is an effective choice. Model Number: 0311-GA