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Moisture-Curing One Component Elastomeric Fluid Applied Flashing Membrane

20oz Sausage

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Henry Air-Bloc LF is a moisture-curing one component elastomeric fluid applied flashing membrane using a highly advanced STPe (Silyl-Terminated Polyether) polymer.


It is designed to cure through reaction with airborne moisture to provide a heavy-duty “seamless” rubber-like, impervious membrane with excellent weathering and water resistance. 

Low VOC formulation (<22 g/l)

  • Improved air quality
  • Reduced ground level ozone pollution
  • Safer to use  
Moisture Cure
  • Bond and cures in wet weather
  • Damp surface tolerant 
High Solids (95% Solids)
  • Minimal shrinking
  • Fast film build  
Single Component
  • Easy to apply with no special tools
  • Easy to cleanup 
Ideal for complex details, including:
  • Window and door flashing
  • Sheathing joint sealant
  • Membrane termination sealant 
Excellent Adhesion
  • Bonds to all Henry Air Barrier membranes
  • All Henry Air Barrier membranes adher to Air-Bloc LF
  • Adheres to concrete, cmu, primed steel, aluminum mil finish, anodized aluminum, galvanized metal, exterior grade gypsum board and plywood
  • Many silicone sealants show excellent adhesion characteristics to Air-Bloc LF
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