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