NorWesco 2.67 in. x 50 ft. Z-Stop Roofers Roll is specially designed to protect your roof by inhibiting the growth of moss and mildew. I for use on wood or composition roofs, it is applied to roof peaks, under ridge caps, and beneath chimneys, gables, skylights, and more. This product helps maintain the integrity and appearance of your roof by preventing future moss and mildew growth, although it does not remove any existing growth. Installation is straightforward using grommeted galvanized roofing nails or roofing adhesives, making it a practical choice for homeowners looking to extend the life of their roofs. Model Number: 519124