Henry Air-Bloc 31MR

Manufacturer: Henry
Product Type: Liquid Permeable

Short Description

Liquid Emulsion Vapor Permeable Air Barrier Membrane

Quantity Needed

Liquid-applied with a trowel or spray, Henry’s Air-Bloc 31MR is a one-component, rubberized membrane that provides an air barrier when applied to a range of construction surfaces. Air-Bloc 31MR cures to a tough, monolithic rubber-like membrane.


  • Retains flexibility over a wide temperature range and 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