Gardner-Gibson 6230 The product is 4.75 Gallon Fiber Enforced All Weather Roof Cement - Wet/Dry Applications - Thick Trowel Grade Easy to use The product is manufactured in China Black Jack All-Weather Roof Cement is a pliable asphalt roof cement that can be used on damp as well as dry surfaces Use for the construction and repair of flashings, but not on rubber membranes or EPDM roofing systems It may also be used to seal cracks in exterior chimneys, walls, foundation joints and for lining leaking gutters and troughs Fiber-reinforced. Thick trowel grade Use in wet or dry conditions