Henry® Vapor Permeable Air Barriers

Not all air barriers are vapor barriers. Air Bloc® 07, Air Bloc 31, and Air Bloc 33 are vapor permeable air barrier systems, which provide continuous air tightness and water protection, while remaining permeable to the passage of vapor. To complete the systems, Blueskin® is used as a transition membrane to span gaps between dissimilar surfaces in key areas such as wall-to-window frames, wall-to-slab, wall-to-roof junction, etc.

Henry vapor permeable air barriers offer designers greater flexibility in their wall designs since their position woHenuld not interfere with the vapor diffusion of the wall assembly. Because of their high vapor permeance, vapor permeable air barriers can essentially let the wall "breathe" and are considered "breather type membranes"

Air Bloc 07 is ideal for cold weather application, Air Bloc 31 is ideal for projects that require a low VOC, low odor, and non-flammable product. Air Bloc 33 is UV Resistant and is ideal for use behind open face wall panels and/or claddings. For more help in choosing the appropriate air barrier for your project please contact our technical services department at 1-800-486-1278.

Used to provide an air and rain barrier on exterior construction surfaces such as masonry, concrete, exterior grade gypsum, or rigid insulation in systems utilizing an interior vapor barrier such as polyethylene film where the entrapment of water vapor is to be avoided.

Choose Air Bloc 07 for applications during cold temperatures.

Air Bloc 31

Used to provide an air and rain barrier on construction surfaces such as masonry, concrete, or gypsum board. Can be installed on the cold side of the wall assembly without trapping moisture. Air Bloc 31 is water based, non-flammable and has a very high water vapor permeance.

Choose Air Bloc 31 for projects requiring low VOCs, low odor applications. It is excellent for use in retrofit projects.

Air Bloc 33

Used to provide a UV resistant air barrier and rain barrier when used in conjunction with rainscreen wall systems. Air Bloc 33 is water based, fire resistive and has a very high water vapor permeance.

Choose Air Bloc 33 for projects requiring a UV resistant air barrier. It is excellent for application behind open face wall panels or if extended exposure of the air barrier is anticipated during the construction process.