A heavy-duty, 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. Ideal for the repair of cracks, seams, and holes in all roofing materials. It is also excellent for use below grade in heavy duty foundation waterproofing and damp-proofing. Formulated for year round use. 11 oz. cartridge.