Henry RC017070 17-Flashing Cement, 5 GallonHighlights: Size: 5 Gallon Designed for repairing leaks in asphalt, metal, and composition roof surfaces Material used for waterproofing and on flashing where a heavy duty product is required and as an emergency patching compound that provides good water resistance Useful for repairing leaks in shingles, concrete, gutters and around chimneys, downspouts and eaves Covers 12 1 2 sq ft per gallon when applied 1 8" thick. WARNING: This product can expose