Securock ExoAir 430

Securock® ExoAir® 430 pre-applied fluid-applied synthetic permeable air/water barrier membrane is a monolithic, elastomeric membrane that is applied in a factory setting eliminating the inconsistencies and weather impact that can occur when applied in the field.  It is applied to the face of USG's Brand Ultralight Glass-Mat Sheathing panels for above-grade wall assemblies to mitigate air infiltration/exfiltration and water penetration while remaining permeable to the passage of water vapor.

Learn more about how you and your project can benefit from Securock ExoAir 430.

Basic Uses
  • The controlled factory application of the membrane to the face of the panel provides the assurance that only a traditional thick-film membrane can.
  • With the Securock® ExoAir® 430 System, application variability of the air barrier is no longer a concern; our controlled factory environment ensures proper mil thickness and membrane uniformity, which means no more job site rework and less job site waste. In addition, membrane adhesion is assured; it can’t wash off from rain or from improper sheathing preparation.
  • The direct connection of the detailing sealants to the air barrier membrane gives you the visual verification of air barrier continuity.

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Frequently Asked Questions
  • What is the Securock ExoAir 430 System?

    The Securock ExoAir 430 System is a high-performance, energy efficient air and water barrier system comprised of the USG’s Securock Glass-Mat Sheathing, Tremco’s ExoAir 430 membrane, as well as system accessories. The system accessories contain sealants and transition products that provide a comprehensive air barrier system.

  • Where should the Securock Exoair 430 System be specified and why?

    We recommend specifying the Securock ExoAir 430 System in Division 7 - fluid-applied air barriers - because the system utilizes a fluid air/water material applied to glass mat sheathing. The application takes place in a controlled environment as opposed to the field, providing a more consistent membrane application; this high-performance factory fluid-applied system will meet and/or exceed the building performance requirements.

  • What is the difference between 5/8” or 1/2” thick gypsum sheathing?

    ½-inch and 5/8-inch thick gypsum sheathing differ in the core's chemistry. 5/8“ is known as fire rated and Type X in the industry. Type X designation has been tested by ASTM E 119/UL 263 guidelines. Fire rated walls are used in interior and exterior spaces for fire propagation.

    The benefits of 1/2” thick gypsum sheathing are it is more cost effective, lighter to lift, easier to carry, and can be installed faster than than 5/8-inch.

  • How is Securock ExoAir 430 system different from a fluid, field-applied air barrier?

    The Securock ExoAir 430 System is manufactured in a controlled factory environment. This provides consistent mil thickness, no membrane cure time or risk of washout. This System can reduce man-hours and safety risks, and overall improve the schedule efficiency. The approach maintains the performance qualities of a fluid applied system, while addressing the challenges faced when applying a fluid in the field.

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