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Tremco ExoAir 230 is a fluid-applied, synthetic, vapor-permeable air barrier designed for use in commercial construction applications. 


Product Data Sheet

Application Guide


Formulated to include UV resistance, providing the flexibility to install rainscreen systems with open joints or to allow the membrane to be exposed during the construction process. It also withstands temperatures up to 240°F (115°C) and ASTM E 84 testing for flame spread and smoke development shows it contributes to life safety issues. To provide further assurance of protection, Tremco has gone beyond traditional manufacturer testing and has also done testing on other components ExoAir 230 may be connected to, including Proglaze ETA connectionsand sealants. ExoAir 230 is available in a single grade which can be either roller- or spray-applied to common substrates. When used with other ExoAir components including ExoAir 110 Self-Adhered Air & Vapor Membrane, ExoAir TWF (Thru-Wall Flashing) Membrane, ExoAir Primer, Spectrem 1, Tremflex 834, Dymeric 240FC or Proglaze ETA Connections as a comprehensive system, continuity and long-term performance is assured. 

Basic Uses

  • Is used to stop unrestricted air infiltration and exfiltration through the building envelope.
  • May also be used as a liquid-applied window flashing, enabling the contractor to address both the membrane and window flashing with a single material.
  • Serves as a weather-resistive barrier, keeping liquid water out while allowing water vapor to pass through to avoid trapping moisture within the wall.

Features and Benefits

  • EXOAIR 230 is a UV stable, seamless, monolithic membrane that creates a fully adhered air barrier when properly installed.
  • The ability to roller or spray apply the material affords the contractor the ability to accelerate installation times compared to traditional selfadhered membrane systems.
  • The high-performance properties of the EXOAIR 230 membrane retard the migration of air and bulk water but allow water vapor to pass through the membrane. As a result, vapor permeable systems like EXOAIR 230 allow for more flexibility in the placement of the air barrier membrane in the wall design.
  • EXOAIR 230 is formulated for UV resistance providing the flexibility to install rain screen systems with open joints or to allow the membrane to be exposed longer during the construction process.
  • EXOAIR 230 can be custom colored to meet all of your design needs.
  • EXOAIR 230 is specifically formulated for design options requiring assemblies that have been evaluated for NFPA 285.

Applicable Standards

  • EXOAIR® 230 has been tested to the following industry standards for air barriers:
  • AATCC 127-2008 Water Resistance: Hydrostatic Pressure Test 
  • ASTM C1305 Standard Test Method for Crack Bridging Ability of LiquidApplied Waterproofing Membrane
  • ASTM D412 Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers - Tension 
  • ASTM D1970 Standard Specification for Self-Adhering Polymer Modified Bituminous Sheet Materials Used as Steep Roofing Underlayment for Ice Dam Protection
  • ASTM D4541 Standard Test Method for Pull-Off Strength of Coatings Using Portable Adhesion Testers
  • ASTM E96 Standard Test Methods for Water Vapor Transmission of Materials
  • ASTM E331 Standard Test Method for Water Penetration of Exterior Windows, Skylights, Doors, and Curtain Walls by Uniform Static Air Pressure Difference
  • ASTM E2178 Standard Test Method for Air Permeance of Building Materials
  • ASTM E2357 Standard Test Methods for Determining Air Leakage of Air Barrier Assemblies

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