Air and Vapor Barriers
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Air-Bloc® 21

Air and Vapor Barrier and Insulation Adhesive

 
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Air-Bloc® 21 is a trowel consistency, solvent-type, synthetic rubber-based insulation adhesive formulated for easy application on a range of construction surfaces.

Air-Bloc® 21 is designed to provide an effective air and vapor barrier when used as a full bed adhesive in conjunction with rigid foam or semi-rigid paper-faced insulation. Also available as a fire-resistive air and vapor barrier, Air-Bloc® 21FR is used as a full bed adhesive in conjunction with rigid foam or semi-rigid paper-faced insulation.

Another form of Air-Bloc® 21, Air-Bloc® 21S is a spray consistent, solvent-type, synthetic rubber-based insulation adhesive formulated for easy application on a range of wall surfaces.

Features

  • Trowel-applied at temperatures as low as 10ºF (Air-Bloc® 21 and 21FR); Spray-applied at low temperatures on masonry, concrete, drywall and wood (Air-Bloc® 21S)
  • Spreads smoothly on many surfaces, including masonry, concrete, gypsum board and wood
  • Seals around projections such as brick ties
  • Adheres to most types of rigid insulation
  • Cures to a flexible film that resists air leakage

Packaging

  • Air-Bloc® 21 and 21FR – Available in 5-gallon pails
  • Air-Bloc® 21S – Available in 5-gallon pails or 55-gallon drums
 
Air Barrier Brochure

Air Barrier
Brochure

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BES Brochure

Henry Building Envelope Systems Brochure

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Data Sheets

Air-Bloc® 21 Data Sheets Download PDF Add to BES Binder    
Air-Bloc® 21FR Data Sheets Download PDF Add to BES Binder    
Air-Bloc® 21S Data Sheets Download PDF Add to BES Binder    
 

MSDS Sheets

Air-Bloc® 21 MSDS Sheet Download PDF Add to BES Binder    
Air-Bloc® 21FR MSDS Sheet Download PDF Add to BES Binder    
Air-Bloc® 21S MSDS Sheet Download PDF Add to BES Binder    
 

Tech Talks

NFPA 285 Assemblies Download PDF Add to BES Binder    
Use of Masonry Anchors Download PDF Add to BES Binder    
Conversion Charts Download PDF Add to BES Binder    
Coatings and Sealants Download PDF Add to BES Binder    
         

Health Product Declaration

Air-Bloc® 21 Health Product Declaration Download PDF Add to BES Binder    
Air-Bloc® 21FR Health Product Declaration Download PDF Add to BES Binder    
Air-Bloc® 21S Health Product Declaration Download PDF Add to BES Binder    
         
 
Air Barrier Brochure

Air Barrier
Brochure

Download PDF   Add to BES Binder

 
BES Brochure

Henry Building Envelope Systems Brochure

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Specifications

Air-Bloc® 21 Spec Sheet Download Word File Add to BES Binder    
 

Architectural Details

AB-H101 Parapet Details – Brick Veneer/Steel Stud Download PDF Add to BES Binder Download DWG Add to BES Binder
AB-H102 Parapet Details – Brick Veneer/CMU Download PDF Add to BES Binder Download DWG Add to BES Binder
AB-H105 Shelf Angle Details – Brick Veneer/Steel Stud Download PDF Add to BES Binder Download DWG Add to BES Binder
AB-H106 Shelf Angle Details – Brick Veneer/CMU Download PDF Add to BES Binder Download DWG Add to BES Binder
AB-H111 Commercial Window Details – Window A – Brick Veneer/CMU Download PDF Add to BES Binder Download DWG Add to BES Binder
AB-H112 Commercial Window Details – Window B - Brick Veneer/CMU Download PDF Add to BES Binder Download DWG Add to BES Binder
AB-H109 Foundation Wall Details – Brick Veneer/CMU Download PDF Add to BES Binder Download DWG Add to BES Binder
AB-H115 Plan Details – Brick Veneer/CMU Control/Expansion Joint Download PDF Add to BES Binder Download DWG Add to BES Binder
AB-H117 Plan Details – Stucco/Steel Stud/CMU Download PDF Add to BES Binder Download DWG Add to BES Binder


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