Black Jack, 29 OZ, All Weather Roof Cement, Fiber Reinforced, Thick Trowel Grade, Pliable Asphalt Roof Cement That Can Be Used In Wet Or Dry Conditions, Seals Cracks & Splits, Seals Flashings & Other Roof Projections, Ideal For Many Roof Repairs & For Stopping Roof Leaks Around Vent Pipes, Spouts, Valleys, Skylights, Gutters, & Chimneys, Use For Construction & Repair Of Flashings, But Not On Rubber Membranes Or Epdm Roofing, May Also Be Used To Seal Cracks In Exterior Chimneys, Walls, Foundation Joints & For Lining Leaking Gutters & Troughs, 3 Year Limited Warranty.