Fibered repair mastic, designed to patch roof surfaces. Use in wet or dry conditions to seal and stop leaks around flashings, skylights, vent pipes, chimneys and valleys. For the repair of cracks, seams and holes in all roofing materials. Can be used below-grade as a heavy-duty foundation waterproofing and damp-proofing. Thick trowel grade. Covers approximately 12 sq-ft per gal when applied 1/8 in thick.Seals cracks and splitsThick trowel-grade