Zip-Up Products Air-Tight Twin Zipper Door - 84" x 3" 2 Pack For Jobsite Dust Containment with Patented Airtight Zipper & Peel & Stick Backing - ZIP7.3TWB PATENTED ZIP-UP ZIPPERS  Built to last longer in any weather condition while maintaining a stronger bond. Suitable For indoor and long-term outdoor use in any weather conditions and can be applied at temperatures ranging from -20 to 150 degrees Fahrenheit AIRTIGHT & WATERTIGHT SEAL  With proper installation, the Twin Zipper Door provides airtight dust and debris containment, perfect for any jobsite, construction site, or remodel. The patented poly woven zipper will also stay water-tight EASY PEEL & STICK  Zip-Ups unique adhesive has been formulated with a quick-stick capability that enables the zipper to be repositioned during the initial installation. After the adhesive has been set for some time it will form a high-strength bond to the poly sheeting PREMIUM MATERIALS  Made from heavy duty blue woven poly backing for long-term durability