Products / Karnak 18 Perfectseal Flashing Cement

Karnak 18 Perfectseal Flashing Cement is a trowel-grade cement of selected asphalts, mineral fibers and refined solvents, offered in summer, semi and winter consistencies. The maker lists it for repairing leaks in shingle, concrete, metal and asphalt roofs and flashings at walls, chimneys, flues and downspouts. Its product page lists ASTM D4586 Type I Class I, SS-C-153 Type I (AF) and a VOC of 250 g/L maximum. It is sold in 55 gallon drums and 5 and 3 gallon pails.