This black elastomeric roof and chimney flashing sealant provides a flexible, waterproof barrier to stop leaks around chimneys, vents, skylights, and other roof penetrations. Its advanced formula offers superior adhesion to masonry, aluminum, asphalt shingles, and other common roofing materials while remaining flexible to withstand weather-related expansion and contraction. The easy brush-on application and 1/2 gallon coverage of approximately 14 square feet make it a practical choice for durable, long-lasting roof repairs.