Category: Air and Vapour Barriers & Underlayments

Lexshield SA Air and Vapour Barrier Membrane and Flashing Tapes



Air & Vapor Barrier Tape 

Lexshield SA is a self-adhered Air and Vapour Barrier Membrane for use in walls and roofs. It consists of a cross-laminated, high-density polyethylene film backed with a proprietary high tack adhesive and a silicone release liner (4 inches, 6 inch, 9 inch, 12 inch, 18 inches, and 36-inch rolls). It is compatible with most fluid-applied air barriers and insulation adhesives.

Air Barrier Uses:

  • For Cavity walls
  • As a transition membrane for flashing window and door openings

Vapour Barrier Use:

  • For flat roofs



  • Excellent Air and Vapour Barrier flashing tape Properties – Surpasses the industry’s most rigorous air and vapor resistance tests
  • Flexible – Remains leak-free, even when subjected to differential expansion and contraction forces or minor cracking in the underlying substrate
  • Tear & Puncture Resistant – high-density film used provides excellent resistance to accidental cuts and tears during installation
  • No Primer Required – Super tacky adhesive formulation sticks well to virtually any surface; mechanical fastening is not required at plane or direction changes*
    *: When installing Lexshield on porous/fibrous surfaces, a test strip should be done to ensure if a primer is required for proper adhesion of membrane.
  • Apply in Cold Temperatures – Can be applied in temperatures as low as -20°C (-4°F)!**
    **: When installing Lexshield in temperatures below 0 °C, a test strip should be done to ensure if a primer is required for proper adhesion of membrane.
  • Seals Around Fasteners – LexShield™ self-seals around screw and nail penetrations***
    ***: Penetrated by numerous roofing screws into 22 ga. steel deck, LexShield™ showed no leakage after 24 hours submersion under 25 mm of water. Full test procedures and results available from Lexcor.
  • Economical – LexShield’s™ state-of-the-art technology offers improved benefits over traditional air barrier systems at a lower installed cost!

Additional information

Weight1.30 lbs
Dimensions4.75 × 4.75 × 4 in

4 inch x 75 feet, 6 inch x 75 feet, 9 inch x 75 feet, 12 inch x 75 feet, 18 inch x 75 feet, 36 inch x 75 feet