2" Blue Tuck, Contractor Grade Sheathing, Tape, 180 ft. Roll. Blue Tuck Tape is used to seal joints and seems on polyethylene vapour barrier. Dimensions: 2 in. x 180 ft. (60 mm. x 55 m.) Application: Specifically designed to be used in sealing seams of PE vapour barrier. Benefits: Mold, moisture, water and UV resistant. Prevents air infiltration. High tack adhesion. Easy to tear and safe to use. No knife required. Blue Tuck Tape (sheathing tape) must be firmly pressed onto a clean, dry surface. It is recommended that you check your local building codes for regulations.