Tyvek Flashing Tape 9 inch x 75 ftDuPont Tyvek Flashing Tape 9 in x 75 ft Self Adhered Flashing Tape DuPont Tyvek Flashing Tape is a professional grade self adhered flashing tape designed to seal windows, doors, and wall transitions against air and water intrusion. The 9 inch width provides expanded coverage for larger openings and deeper returns while remaining easier to handle than extra wide flashing formats. In simple terms: This wider flashing tape gives you more coverage around