ExoAir 220
Fluid-Applied Asphaltic Air & Vapor Permeable Membrane
ExoAir® 220 is a high-performance, elastomeric asphalt emulsion air barrier designed to be fluid-applied onto exterior above-grade wall assemblies. It creates a monolithic, seamless air and vapor-permeable membrane that helps manage water, vapor, and air infiltration across a wide range of substrates. ExoAir 220 can be spray- or roller-applied, offering exceptional installation flexibility without sacrificing protection and performance.
Key Benefits of ExoAir 220
- Seamless Membrane: Forms a continuous barrier to control both air movement and water vapor diffusion.
- Versatile Application: Compatible with concrete, plywood, masonry, metal, and gypsum sheathing.
- Roller or Spray Applied: Allows adaptability in jobsite conditions and installation preferences.
- Permeable Yet Protective: Meets ASTM E2178 and E96 with excellent perm rating and air permeance.
Common Applications
- Exterior-grade gypsum sheathing
- Unsealed masonry and block walls
- Plywood and OSB wall assemblies
- Metal panels and concrete substrates
Packaging & Installation
ExoAir 220 is supplied in liquid form and is applied directly to substrates using a sprayer or roller. With an application temperature starting at 40 °F (5 °C) and rising, it is suitable for a variety of climates and seasonal construction schedules. Its 13 perm vapor transmission rate makes it a breathable yet resilient solution for managing moisture.
Product Properties
| Property | Value |
|---|---|
| Application Temperature | Above 40 °F (5 °C) and rising |
| ASTM E2178: Material Air Permeance | 0.002 cfm/ft² @ 1.56 lb/ft² (0.012 L/s·m²) |
| ASTM E96: Water Vapor Transmission | 13 perms |
| NFPA 285: Fire Resistance of Assembly | Pass |
Also see Securock ExoAir 430 for a panelized solution. Learn more at Tremco Sealants.
