G-Tape 3040BK Flashing Tape has become a "must have" solution for deck builders across the country because of its extreme performance and simplicity. No other flashing tape performs like it. Deck joist life span is greatly increased. Why You Need It  Sticks to exterior surfaces in temperatures ranging from -20°F to 200°F. Sticks to the toughest surfaces in the most extreme environments. Tears easily by hand. Easy to un-stick from itself and re-position. Fifty-year aging tests show it retains over 60% of its original adhesion and 100% of its tensile strength.