Air-Bloc® 21 and 21 FR

Air and Vapor Barrier and Insulation Adhesive

Air-Bloc<sup>®</sup> 21 and 21 FR

Air-Bloc® 21

Air and Vapor Barrier and Insulation Adhesive

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.

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
  • 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

Related products

Literature

  • Installation and Technical Literature

    Air-Bloc® 21 Data Sheets Click to download  

    Air-Bloc® 21FR Data Sheets Click to download  

    Air-Bloc® 21 SDS Sheet Click to download  

    Air-Bloc® 21FR SDS Sheet Click to download  

    Air-Bloc® 21 Health Product Declaration Click to download  

    Air-Bloc® 21FR Health Product Declaration Click to download  

  • Tech-Talks

    NFPA 285 Assemblies Click to download

    Use of Masonry Anchors Click to download

    Conversion Charts Click to download

    Coatings and Sealants Click to download

  • Specifications

    Air-Bloc® 21 Spec Sheet Click to download  

  • Architectural Details

    AB-H101 Parapet Details – Brick Veneer/Steel Stud pdf cad

    AB-H102 Parapet Details – Brick Veneer/CMU pdf cad

    AB-H105 Shelf Angle Details – Brick Veneer/Steel Stud pdf cad

    AB-H106 Shelf Angle Details – Brick Veneer/CMU pdf cad

    AB-H111 Commercial Window Details – Window A – Brick Veneer/CMU pdf cad

    AB-H112 Commercial Window Details – Window B - Brick Veneer/CMU pdf cad

    AB-H109 Foundation Wall Details – Brick Veneer/CMU pdf cad

    AB-H115 Plan Details – Brick Veneer/CMU Control/Expansion Joint pdf cad

    AB-H117 Plan Details – Stucco/Steel Stud/CMU pdf cad

  • LEED Declarations

    Air-Bloc® 21 Adhesives and Sealants LEED Declarations Click to download

    Air-Bloc® 21FR Adhesives and Sealants LEED Declarations Click to download

    Air-Bloc® 21 Air Barriers – Liquid-applied LEED Declarations Click to download

    Air-Bloc® 21FR Air Barriers – Liquid-applied LEED Declarations Click to download

  • Health Product Declarations

    Air-Bloc® 21 Health Product Declaration Click to download

    Air-Bloc® 21FR Health Product Declaration Click to download