The Gardner Wet-R-Dri is a heavy-duty, fibered repair mastic, designed to patch roof surfaces. Use in wet or dry conditions to seal and stop leaks around vent pipes, flashings, chimneys, skylights and valleys. Wet-R-Dri Roof Cement is 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 water-proofing and damp-proofing. Product is formulated for year round use.