Black Jack 10 oz All-Weather Roof Cement is a pliable asphalt roof cement that performs well in both wet and dry conditions. It seals cracks, splits, flashings, and other roof projections with its fiber-reinforced, thick trowel-grade formula. Ideal for a variety of roof repairs, including stopping leaks around vent pipes, spouts, valleys, skylights, gutters, and chimneys, it can also be used for constructing and repairing flashings. However, it is not suitable for rubber membranes or EPDM roofing. Additionally, it can seal cracks in exterior chimneys, walls, foundation joints, and line leaking gutters and troughs. Note that Plastic Roof Cement is not paintable and is intended for exterior use only. Coverage is approximately 30 linear feet per tube, and cleanup requires mineral spirits.