Chimney RX Black Elastomeric Flashing Sealant is specially formulated to provide permanent adhesion to asphalt shingles, aluminum flashing, brick, and various chimney and roofing materials. This elastomeric sealant is i for stopping leaks around the base of chimneys, stacks, vents, and for sealing around skylights. It remains flexible over time and an easy brush-on application for convenience. For optimal curing, it requires at least 12 hours of dry, clear weather. The black color blends seamlessly with roofing surfaces, and each 1/2 gallon container covers approximately 14 square feet, making it a reliable choice for durable roof repairs. Model Number: 300054