Heavy duty, hot melt, solvent free adhesive combined with polypropylene backing keeps out moisture, dust and dirt and assures reliable closures. Designed for industrial use, one strip at a time instead of many layers. Resistance to splitting and slivering saves time, while a release coating makes unwind easy. 3.1 mil thickness. 1.88 Inches x 54.6 Yards. Package of 12 comes with a DP300RD dispenser.