This product is a sealer and filler for use in patching cracks and breaks in roofing surfaces, firewalls, chimneys, gutters, flashing, etc. particularly in emergency situations where the stopping of a leak from a wet surface must be done. It is ideal for patching and roof maintenance, sealing and repairing shingle tabs, flashings, roof seams and gable joints. It can be used to stop leaks around vent pipes, spouts, and gutters and is suitable for sealing metal building seams, foundations, masonry steps, or in repainting chimneys. Do not use on tar roofs.