Air-Bloc All Weather STPE®

Rain Ready, UV-Resistant, Vapor Permeable Water-Resistive Air Barrier

Air-Bloc All Weather STPE<sup>®</sup>

Air-Bloc All Weather STPE® 

Fluid Applied Vapor Permeable Air Barrier

A vapor permeable membrane with long-term UV resistance, Henry® Air-Bloc All Weather STPE®  is a single-component, moisture cure Silyl Terminated Polyether (STPE) water-resistive air barrier. Featuring a high solids content and quick cure time, Air-Bloc All Weather STPE®  can be applied with rain in the forecast, helping to reduce job-site weather delays. Its hydrophobic nature also means it won’t wash off in the rain. Plus, it can be spray-, roller- or brush-applied.  Air-Bloc All Weather STPE®  is part of the Air-Bloc® portfolio of fluid applied air barriers within the Henry® Building Envelope Systems® family.

Features and benefits

  • Rain ready within 30 minutes, helping to reduce job-site weather delays
  • Can be exposed for up to 12 months during construction, providing scheduling flexibility
  • Permanent UV exposure behind open-joint cladding offers design flexibility
  • Can be used as a liquid flashing when Air-Bloc All Weather STPE is the primary membrane, resulting in quicker air barrier system installation (Passes AMAA 714-19. See Installation Manual and Technical Data Sheet for details.)
  • Vapor permeable membrane allows walls to breathe
  • Sprayable, one-coat application and high coverage rate for a faster, quicker installation
  • Vertical and lateral flame propagation: meets NFPA 285 Exception #2 per ASTM E1354 and ASTM E84

Sizes available:

  • 5 gallon (18.82 L) pails
  • 55 gallon (205 L) drums


  • Black

Complete the system

"Henry Air-Bloc All Weather STPE is an easy-to-spray product. It is beneficial to be able to spray with rain in the forecast and not create job site delays for the general contractor."
Landon Royals
Owner - Royals Commercial
Millersville, MD
"With the very narrow windows of good weather here in the NW, Henry Air-Bloc All Weather STPE is a great product that fulfills our needs. It’s very easy to apply and moisture cured, which allows us to capitalize on the good windows of weather."
Mitch Rask
Department Manager - AWB & Plaster
Wilsonville, OR


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