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From: $139.72


Henry Air-Bloc 33MR is a UV-Resistant, Vapor Permeable Air and Weather Barrier Membrane


Henry Air-Bloc 33MR is a UV-resistant, one-component, elastomeric membrane that provides an air barrier on a range of construction surfaces. Liquid-applied with a trowel or spray, Air-Bloc 33MR cures to a tough, monolithic rubber-like membrane that resists air leakage along with UV radiation and weather.


  • Seamless, UV-resistant elastomeric membrane bridges cracks
  • Adheres to most construction surfaces, including block, concrete, stone, wood and metal
  • Can be applied to damp concrete
  • Contains no organic solvents
  • Integral mold resistant formulation as per ASTM D5990


  • Available in 5-gallon pails or 55-gallon drums
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