Use as an emergency patching compound that provides good water resistance. Repairs holes, cracks and splits on composition, smooth and mineral cap sheet, asphalt coated, SBS modified, metal and masonry roof surfaces. Repairs leaks in shingles, concrete, gutters, around chimneys and eaves. Provides a permanent patch of unusual strength over most surfaces when reinforced with patching fabric or a suitable asphalt roofing membrane. Covers 12-1/2 sq-ft per gal applied 1/8 in thick or 30 sq-ft per 5 gal pail on a 3-course application.