Premium SBS modified compound for sealing roof leaks on wet surfaces. Seal leaks and openings around flashings, chimneys, vents, skylights, joints in metal edging, and gutters, etc. Patches holes, cracks, and splits on composition, mineralsurface cape sheet, metal, and masonry roofs even in a driving rain or under water. May be used in wet, dry, warm or cold weather. Made from heavy-bodied asphalt. Covers 12.5 sq. ft. per gallon applied at a thickness of 1/8". Meets or exceeds all requirements of ASTM Specification D-4586, Type I except for high-temperature sag.