29 FL OZ Black Jack, 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 and other roof projections. Ideal for many roof repairs and for stopping roof leaks around vent pipes, spouts, valleys, skylights, gutters, and chimneys. Use for construction and repair of flashings, but not on rubber membranes or EPDM roofing. May also be used to seal cracks in exterior chimneys, walls, foundation joints, and for lining leaking gutters and troughs. 3 year limited warranty