All of our information is sourced from manufacturer data.

Air-Bloc 21

Henry Company

Air-Bloc 21

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Fluid Applied Membrane Fluid Applied Membrane

Mineral Mineral

Air Barrier, Sloped Ceiling Air Barrier, Sloped Ceiling

Concrete Surfaces, Masonry Surfaces, Unfinished Floor Concrete Surfaces, Masonry Surfaces, Unfinished Floor

Design Options

Product Description

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



Sheet Length


Sheet Width


Performance Data

Roll Tensile Strength

Weight needed to break the roll, per inch of width

Water Vapor Transmission

An imperial perm is defined as 1 grain of water vapor per hour, per square foot, per inch of mercury

perm (imperial)


Product Weight Per Area

lb / ft ^ 2


Minimum Temperature Rating

The lowest temperature that the product has been confirmed to still function at.



Minimum Application Temperature

Minimum temperature that the product can be applied or installed



Air Permeance

Rate of airflow through the barrier per square foot at a specified pressure difference

cfm /ft^2 @ 1.57 psf


Henry Company