Products / Perflash

Perflash is a modified bitumen flashing cement formulated for adhering Derbigum polymer modified asphalt flashing membranes to vertical surfaces, with 86% non-volatile content. The product page states it can also be used for filling pitch pans, setting roof drain leads and metal flashing components. It is applied by trowel or gloved hand at 7.5 gallons per 100 square feet at 1/8 inch, and the data sheet lists 30 ounce cartridges and 5 gallon pails.